homeworkhomework read section 4.4 answer questions 26 & 27 on page 107
TRANSCRIPT
![Page 1: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/1.jpg)
HomeworkRead section 4.4Answer questions 26 & 27 on page 107.
![Page 2: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/2.jpg)
What you will learn today:
![Page 3: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/3.jpg)
What you will learn today:
![Page 4: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/4.jpg)
What you will learn today:
•nuclear reaction•radioactive decay•alpha particle•beta particle•gamma ray
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Chemistry is all about the
electrons.
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The nucleus doesn’t get involved in chemical reactions.
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But there are such things as nuclear reactions.
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In the late 1800’s, scientists discovered radioactivity.
![Page 9: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/9.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 10: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/10.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 11: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/11.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 12: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/12.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 13: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/13.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 14: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/14.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 15: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/15.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 16: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/16.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 17: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/17.jpg)
In the late 1800’s, scientists discovered radioactivity.
![Page 18: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/18.jpg)
So what is radioactivity?
In the late 1800’s, scientists discovered radioactivity.
![Page 19: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/19.jpg)
Radioactive source in a lead box
screen
So what is radioactivity?
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positive
negative
screen
So what is radioactivity?
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positive
negative
So what is radioactivity?
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Alpha (α)+2
positive
negative
So what is radioactivity?
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Alpha (α)+2
positive
negative
So what is radioactivity?
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Alpha (α)+2
positive
negative
Beta (β)-1
So what is radioactivity?
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Alpha (α)+2
positive
negative
Beta (β)-1
So what is radioactivity?
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Alpha (α)+2
positive
negative
Beta (β)-1
Gamma (γ)0
So what is radioactivity?
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alpha particle
α 2 protons + 2 neutrons
mass ≈ 4 AMUcharge = +2
So what is radioactivity?
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beta particle
β1 electronmass ≈ 1/1000 AMUcharge = -1
So what is radioactivity?
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gamma ray
γpure energymass = 0charge = 0
So what is radioactivity?
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226 88Ra
So what is radioactivity?
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mass number 226 atomic number 88Ra
So what is radioactivity?
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226 88 Ra→
So what is radioactivity?
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226 222 88 86 Ra→ Rn
So what is radioactivity?
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226 222 4 88 86 2Ra→ Rn+ He
So what is radioactivity?
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226 222 4 88 86 2Ra→ Rn+ Heradium-226
So what is radioactivity?
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226 222 4 88 86 2Ra→ Rn+ Heradium-226 radon-222
So what is radioactivity?
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226 222 4 88 86 2Ra→ Rn+ Heradium-226 radon-222 alpha particle
So what is radioactivity?
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radium-226 radon-222 alpha particle
So what is radioactivity?
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238 234 4 0 92 90 2 0U→ Th+ He + 2 γ
So what is radioactivity?
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238 234 4 0 92 90 2 0U→ Th+ He + 2uranium-238 thorium-234 alpha particle gamma ray
γ
So what is radioactivity?
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uranium-238 thorium-234 alpha particle gamma ray
So what is radioactivity?
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14 14 0 6 7 -1C→ N + β
So what is radioactivity?
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14 14 0 6 7 -1C→ N + βcarbon-14 nitrogen-14 beta particle
So what is radioactivity?
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So what is radioactivity?
![Page 45: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/45.jpg)
So what is radioactivity?
![Page 46: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/46.jpg)
So what is radioactivity?
![Page 47: HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107](https://reader036.vdocument.in/reader036/viewer/2022081605/5a4d1b1b7f8b9ab059993824/html5/thumbnails/47.jpg)
HomeworkRead section 4.4Answer questions 26 & 27 on page 107.