Tuesday, January 5, 2010

Week #9 March 1-7

Please use this space to share your reflections of our learnings this week. What are the concepts that we discussed? What are the important vocabulary words that you learned? Are there any topics that we have covered that you are still unsure of?

76 comments:

  1. This week, we are moving on to talk about radioactivity and such. So far, we have only discussed how to balance equations with Alpha or Beta particles. It's all making sense to me this far!

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  2. This week I lernd that isotope are atoms af the same elemant that contain differnt nunbers of neatons. the way you can tell the number of isotopes is how many neatons there are. you can tell if the isotopes is apart is the way how many neatron there are. some of the way you can tell is that the camial is rest into the air. it is very importain to study of isotopes becouae it will tell us how old a thing is and how bod it is.

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  3. This week we began to talk about radiation. We also learned about isotopes they are, atoms of the same element that contain different numbers of neutrons. We also learned how to balance equations with Alpha and Beta chemicals. This week I felt like I understood everything and it went well.

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  4. This week we have learned about how to balance radio active decay. We have learned about isotopes and a few other things revolving around radio active decay. I get what we have been doing this whole week.

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  5. This week we learned about isotopes. An isotope is elements of the same type that have different number of neutrons. Ha :D. We learned the symbol notations that express different isotopes of an element and got to practice them on the three worksheets we did in class today. We also learned the three types of radiation, alpha particles, beta parictles, and gamma rays. When an isotope decays it releases these three types of radiation in order to become stable. That's what I learned this week.

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  6. This week we learned about isotopes, radioactive decay, and half-lifes. Isotopes are atoms of the same element that contain different numbers of nuetrons. The half-life of a radio active element tells us how long it will take for 1/2 of the element to decay. This is important becuase it provides us with information about the radioactive decay at the core of the earth. In lab, we tossed 128 pennies onto the table and counted how many were heads and tails. Theoretically, the amount for each should be 1/2 of the previous, total number. Also, radioactive materials will never decay completely. There will always be a small portion of radioactive material left.

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  7. We learned alot about isotopes. We learned about how to do alpha and beta decay with them and how to figure out the number of protons and neutrons if you are given the element and the isotope number. We did a lab with pennies that demmonstrated the concept of half-life. Unstable (radioactive) elements will decay into an element that is stable.(most likely iron)

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  8. This week in lab we learned about isotopes. we learned about alpha and beta partials and how to find the number of neutrons and protons. we also learned about a half life in lab. i think i understand the concepts and everything this week.

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  9. In class this week we learned about different types of radioactive decay. Beta, alpha, and gamma particles. We also balanced beta and alpha equations by using the formulas that we were given. Also, in lab we learned about half-lives and isotopes. We experimented with pennies and found out how many half-lives it took for the pennies to decay.

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  10. this week in class we learned about isotopes, as well as beta, alpha, and gamma particles and how to find the number of protons and neutrons in them. ooo and i heard were doing a fun lab too?

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  11. This week we learned how to balance decay equations. And in the lab we tested half-life. Half-Life is the time required for half of the nuclei in a sample of a specific isotope to undergo radioactive decay. And an Isotope is and element of the same type that have different numbers of neutrons.

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  12. this week we learned about beta and alpha decay on radioactive materials and how to balance them. wealso learned about half lifes and the time it takes for radioactive materials to break down.

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  13. This week we were learning about radioactive decay. I learned that atoms decay to become stable or non-radioactive. To balance an equation it requires you to know protons, how to get the number of neutrons from the isotope number, and how to balance the equation it's self. I am feeling very confident in this matter and am looking forward to the test on Monday. It is amazing how long it takes for a radioactive atom to decay. I don't get exactly what happens but will soon.

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  14. This week in class we learned a lot about radiation. We learned what a half life was and how it deals with the radioactive decay in the core of the earth. Also we learned how to balance elemantal equations with both alpha and beta decay. This to also helps us understand what is going on inside the earth and how radiation can be a good thing and a bad thing.

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  15. this week we learned about Radio active decay. and how because of the half life, something never fully decays, it goes half way, than half way again, than half way again. i also learned that the core of the earth is hot because of radioactive decay

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  16. This week we have learned how to balance equations like alpha and beta. Also that there are different types of radioactivity. There is alpha, beta, and gamma particles. we also learned how to balance equations for beta and alpha. In lab we have learned about half lifes and isotopes.

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  17. This week we learned about isotopes and and radioactivity. We also learned how to balance equations such as alpha and beta.This week in lab we learned about half life which is basically how long it takes half of nuclei to undergo radio active decay.

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  18. Last year I had learned very little about isotopes, but I never understood what they really were. This week I have a complete understanding of what isotopes are and what it means when they decay. I also am confident on how to balance decaying equations such as beta and alpha particles.Furthermore, I know how to identify different isotopes because of the different masses.

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  19. This week we learned about radioactive isotopes. We learned about how there are three types of radiation alpha beta and gamma. We learned about how to balance radiation equations and what makes a radioactive isotope. We also learned about what they do to living things.

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  20. This week we learned about radio active decay and isotopes. We learned how to balance radio active decay equations. We also learned about Alpha, Beta and Gamma particles/ rays.

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  21. This week we learned about the decay of isotopes. I learned that they decay by one thousand years and each year it decreases by half, and no matter how longer there will always be apart of it that needs to be decayed.

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  22. This week we learned about decaying isoptopes. We learned how to balance equations when they were beta or alpha rays. Balancing the equations are very simple.

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  23. Lexi Mercier per1
    This week in science we talked about isotopes and radioactive decay reactions. Isotopes are elements of the same type that contain different numbers for neutrons. For example Chromium-58 and Chromium-63 are isotopes, they are the same element but they have a different number of neutrons. Radioactivity is the process where certain isotopes emit particular forms of radiation and the substance that emits the radiation is radioactive. There are three different forms of emitted radiation; alpha, beta, and gamma.

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  24. This week we learned about decaying isotopes and how to balce their equasions. Balancing the equasions is easy.

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  25. This week in science, we learned about radioactive decay and half-livers. In lab, we demonstrated this by doing an experiment with pennies. This experiment used pennies that were heads-up as non-decayed nuclei and pennies that were tails-up as decayed nuclei. We continued to shake and "roll" the pennies until all of them had decayed. This demonstrated the concept of a half-life. In lecture class, we learned how to balance radioative equations. We learned that there are three types of radiation: alpha and beta particles, and gamma rays. Alpha particles are the weakest, beta are the middle, and gamma rays have the highest penetrating power. To balance radioactive equations, you use either alpha or beta decay. Alpha decay uses helium-4 and Beta decay uses a negative election.

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  26. This week in science we learned how to balance decay equations which I found easier the balancing chemical equations. During lab we used pennies to demonstrate a half-life. A half-life is the time required for the nuclei in a sample of a specific isotope to undergo radioactive decay. Isotopes are atoms of the same element that contain different numbers of neutrons. Overall this week was pretty interesting.

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  27. This week in lab we got to learn about the half-life of radioactive molecules. In lab we demonstrated this using pennies. We also learned about isotops. Isotopes are atoms of the same element with a different number of neutrons.

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  28. This week in science class we are learning about radioactive decay. The three major forms of emitted radiation include alpha, beta, and gamma particles. We are currently learning how to balance equations that involve alpha and beta particles. We are also studying isotopes which are atoms of the same element with difference numbers of neutrons. Our class was introduced to the half life of radioactive elements. The half life shows how long it takes for half of a radioactive element to decay.

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  29. This week in science we learned about isotopes and radioactive decay. Isotopes are atoms of the same element with a different amount of neutrons. We learned the three types of isotopes: alpha, beta, and gamma. We learned how to balance the alpha and beta ones. We also discussed half-life in lab.

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  30. This week we have been practicing the decaying of isotopes. We learned how to balance equations and the different types of dacay such as alpha, beta, and gamma. We also learned that radioactive decay is related to the geosphere because of the radioactive decay going on inside the earth's core.

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  31. This week I learned about isotopes. Isotopes are atoms of the same element with a different amount of neutrons. I also learned there are 3 types of isotopes alpha, beta, and gamma. I learned how to balance alpha and beta particles. In lab I also learned about a half-life. A half-life is the time required for the nuclei in a sample of a specific isotope to undergo radioactive decay.

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  32. This week we discussed radioactive decay and Isotopes. We learned about half life in relation to radioactive decay. We learned about the types of radioactive decay: alpha, beta and gamma. We also learned how to balance decaying reactions. We also discussed how quickly radioactive isotopes decay.

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  33. this week in lab we learned about radioactive decay in isotopes and the meaning of a half life that something has. We also learned the different types which are alpha, beta, and gamma.

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  34. This week we learned about radioactivity, and radioactive decay. I thinks its really cool how once an object decays long enough it begins to become radioactive. And this can be very deadly to the human body, and can mutate your cells, and kill you.

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  35. This week we learned about an isotope, or elements of the same type that have a different number of neutrons. We also learned how to balance radioactive equations and the different types of radiation: delta, alpha, and gamma. We also learned about a half-life, or the time required for half of the nuclei in a sample of a specific isotope to undergo radioactive decay. This is different for every isotope.

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  36. We learned alot about isotopes. We learned about how to do Alpha and Beta decay (soon gamma) equasions and how to figure out the number of protons and neutrons if you are given the element and the isotope number. We did a lab with pennies that demmonstrated the concept of half-life. Unstable (radioactive) elements will decay into an element that is stable. I think that the new equasions are the easyist.

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  37. This week we learned about balancing alpha and beta decay reactions, we learned the formulas for solving the. we learned how to read the isotope number of an element. We talked about half life aswell.

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  38. this week we learned ot radiactivity and how to balance radioactive equations. there are 3 main types of decay reactions alpha, beta, and gamma. we learned about isotopes and half life.

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  39. this week, we learned about balancing equations of alpha and beta particles (much easier). we also learned about half-lives. (liked the explanation of the wall.)

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  40. This week we learned about radioactivity and balancing equations with alpha or beta particles. An isotope is an atom of a element with a different number of nuetrons. Isotopes decay because they are unstable and want to become stable.

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  41. In lab this week I learned that isotopes are atoms of the same element that contain different numberes of nuetrons. I learned how to balance radioactive equations; as well as learn what it means for a subatomic particle to be radioactive- it releases Alpha, Beta, and Gamma rays. I also learned what a half-life is for radioactive decaying objects.

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  42. During this week we talked more about radioactvity, and how the different kinds are the alpha and beta, and how the different effects can happen from these different types, we also were talking about, gamma, i think it was too, maybe im wrong. But during lab we performed the half lifes and how we should be able to predict the half life of anything, but the lab demonstrated how we cant determine the exact half life, I think that lab made me really understand that alot more than i would've.

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  43. Blog 1
    This week we learned about isotopes. An isotope is a atom of the same elemant that contains different nunbers of neutrons. We also learned about half-life's and we learned how to balance radioactive equations

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  44. This week we balanced equations as well as learned about radioactivity. We have talked about Alpha and Beta particales. So far I understand it all.

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  45. This week we learned about radioactive decay. We learned about alpha, beta, and gamma particles. We balanced equations too. Equations have to be balanced because of the law of conservation of mass, matter, and energy. In lab we learned about half lifes in isotopes.

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  46. this week in class we learned about isotopes and rediactive decay. we worked on how to solve alpha and betta problems and turned out to be much easier than than balancing equations.

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  47. Radioactive decay is what we talked about this week, along with it alpha, beta, and gamma particles. There was also balancing of equations.

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  48. This week we learn about isotopes radioactive decay and how to balance equations in a new way.I thought that doing equations this way was alot easier

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  49. This week in class we learned about isotopes and radioactive decay. Radio active decay comes from the core of the earth. We also learned about how isotopes have halfs lives which makes themgo down half each time.

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  50. i thought it was kind of ironic that this whole week pretty much in history and science we talked about radioactivity. in history we are studying the time of the A-bomb and when they tested all the nukes, and how the radioactivity stays for a long time and kills any one who is exposed long enough and will for a very long time. in science we talked about how gamma rays completely destroy your body and they are highly radioactive

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  51. This week we learned about beta and alpha. we also learned about radioactive decay and isotopes. this was easy.

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  52. This week we learned about alpha and beta deca. Alpha is with helium and beta with electrons. We learned that the core of the earth is powered by radioactive decay. we also learn about isotopes and half life of uranium.

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  53. This week we learned about radioactive decay and isotopes. We also learned about the half life and how a nuclei is decayed in half so if you started out at 128 then it would half that into 64.

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  54. This week i learned about alpha and beta and i learned alpha is He 4 over 2 and beta which is an electron o over negative. i also learned about how the earths core is powered by radioactive decay and that it is still cooling and when it cools the earth will start to flatten out.

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  55. This week we learned about how isotopes are atoms of the same elements that have different numbers of neutrons. Also we learned how to balance isotope equations, and how alpha and beta decay affects the isotopes in the equations. As well we learned about half life in lab.

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  56. This week in lab we learned about isotopes and radioactive decay. Isotopes are atoms of the same element that contain different numbers of neutrons. We learned that there are three types of radioactive decay: alpha, beta, and gamma. We also learned about how to balance alpha and beta decay and about the half lives of isotopes. Radio active decay occurs because an unstable atom is trying to stabilize.

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  57. This week we learned about radioactivity and because certain isotopes emit certain forms of radiation during radioactivity, we also learned about isotopes. Isotopes are atoms that have different numbers of neutrons but are the same element. We learned how to tell the number of protons, neutrons, and electrons in an isotope. The different types of radiation that are released from radioactivity are alpha, beta, and gamma. We also did a lot of practice balancing radioactive decay reactions with beta decay and alpha decay. An alpha particle has two protons and two neutrons and a beta particle has just one electron.This meant that we had to learn two different ways to balance them correctly. We also learned about half life during lab, and how you can predict an estimate that will be somewhat close to the actual half life.

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  58. This week, we learned about half-life, radioactivity, and how to balance decay equations. Half-life is the time it takes for half of the nuclei in a specific isotope to decay. We demonstrated half-life in lab when we sorted pennies according which side was face up after we dumped them into a box. Radioactivity is when certain isotopes give off particular forms of radiation. Finally, we learned how to balance equations and why it is important to balance equations. Matter cannot be created or destroyed, which is why decay equations need to be balanced.

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  59. This week we learned about radioactivity and radioactive decay. There are threee types of radioactive decay: alpha beta and gamma. We learned how to use all three types in balancing equations. We also learned about half life which is the time it takes for half of the nuclei in an isotope to decay. There isn't really any concepts that I don't understand.

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  60. This week we learned about radioactive decay. Radioactivity occurs with isotopes, which are elements of the same kind, but with different amounts of neutrons. Isotopes emit either alpha, beta, or gamma radiation. Radioactive decay occurs because isotopes are unstable and they are trying to become stable. Once an isotope has decayed to half of what it was, it has reached its half-life.

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  61. Over the past week in science we have been learning about the subject of radioactivity. We learned that even in radioactive decay the conservation of matter still ocurs. Also, we learned that three different rays are produced from radioactive decay, Alpha, Beta, and Gamma.

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  62. This week we learned about radioactive decay in isotopes. We learned how to balance radioactive equations. When there is an alpha decay. It creates helium and the original isotope loses 2 protons and 2 electrons. In a beta decay, it creates an extra electron and an extra proton.

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  63. We learned about radioactive isotopes and decay, how to balance beta and alpha decay formulas, and we learned about half lives.

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  64. Well this week we have mainly learned about isotopes and balancing them and things like that. I really like balancing the isotopes. At first it was sort of confusing and then once I got it it was pretty easy and fun.

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  65. This week we learned details on radioactivity. We were taught that any substance that emits these forms of radiation is said to be radioactive. Three major forms of emitted radiation are alpha (lowest energy), beta (slightly stronger), and gamma rays (strongest). The earth's core is hot because of radioactive decay.

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  66. we learned about radioactive decay and how to balance isotopes. boyce had us repeat what an isotope was about 90 times, and we learned about different types of radioactivity.

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  67. This week in class we learned about isotopes. Isotopes are atoms of the same element that have different numbers of nuetrons. We also learned that some isotopes are radioactive. Radiation can be good or can be bad. It can be used to take x-rays, but it also can give you cancer if you get too much. We also learned that isotopes decay. There are 3 types of decay: alpha, beta and gamma.

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  68. We learned alot this week. We learned about radioactive decay in the Earth's core and worked on finding the number of protons and neutrons in one nucleus with isotopes. We balenced decaying reactions as well. Some of the basics are that protons have a positive charge while neutrons are neutral and electrons have a negative charge. Particles with oppositely charged ends attract while perticles with similarly charged ends repel. The two sub- atomic perticles that act upon the "strong nuclear force" are protons and neutrons. When a nucleus has too few or too many neutrons it is unstable and it admits radiation. And one last thing I feel is important to know is that the term "geothermal" is defined as heat from within the Earth.

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  69. This week we studied isotopes and how to balance them. This was review from last year for me.

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  70. This week we learned about radioactive decay in the core, we learned about different types of radiation and isotopes. We also learned about the strong nuclear force which holds the nucleus in the atom together.

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  71. This week we learned how to balance decay equations. And in the lab we tested half-life. Half-Life is the time required for half of the nuclei in a sample of a specific isotope to undergo radioactive decay. And an Isotope is and element of the same type that have different numbers of neutrons.

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  72. This week in science we talked about isotopes and radioactive decay reactions. Isotopes are elements of the same type that contain different numbers for neutrons. For example Chromium-58 and Chromium-63 are isotopes, they are the same element but they have a different number of neutrons. Radioactivity is the process where certain isotopes emit particular forms of radiation and the substance that emits the radiation is radioactive. There are three different forms of emitted radiation; alpha, beta, and gamma.

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