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Radioactive Decay and Half-Lives Flashcards | StudBud
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Radioactive Decay and Half-Lives
Radioactive Decay and Half-Lives
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Questions about radioactive decay and half-lives, along with some nature of science.
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Answers
1
What is a half-life?
Half the time it takes for a daughter element to fully decay
Time it takes for half the remaining parent element to decay
Time it takes to double the amount of the parent element
Time it takes for an element to lose half a gram.
2
You have 4 grams of a parent element after 1 half-life has passed. How much did you start with?
6 grams
2 grams
4 grams
8 grams
3
Which state is this?
Missouri
Arkansas
Louisiana
Iowa
4
Who is this guy?
Nelson Mandela
Morgan Freeman
Colin Powell
Samuel L. Jackson
5
Which type of radioactive decay do very large elements usually go through?
Theta Decay
Alpha Decay
Beta Decay
Zeta Decay
6
At what point is a scientific idea no longer susceptible to being altered?
When it's proven
After sufficient evidence supports the idea
Scientific ideas are always susceptible to being changed
7
What is an isotope?
Same element, different number of neutrons
A baseball team
Same element, different number of protons
Same element, different number of electrons
8
If you start with 100g, how many half-lives passed if only 12.5g of the parent element remains?
4 half-lives
3 half-lives
2 half-lives
1 half-life
9
How many times has Michigan beaten Iowa State in football?
4
They've never played
23
56
10
Which type of decay has a short half-life?
Theta Decay
Beta Decay
Zeta Decay
Alpha Decay
11
What type of pants was Jake from State Farm wearing?
Jeans
Khakis
Overalls
Jorts
12
Who will be the next president of the United States?
Jill Stein
Hillary Clinton
Gary Johnson
Donald Trump
13
In beta decay, how does the a neutron become a proton?
It doesn't
Attracts an electron, changing its charge to positive
Gives off an electon, making its charge positive
That's not how beta decay works
14
What is the difference between a scientific law and theory?
A theory explains a law.
A law is proven, while a theory is not.
A law explains a theory.
They're the same thing.
15
Why do elements go through radioactive decay?
The element becomes too hot that it alters the element
They're unstable
They go through a chemical reaction
The element loses an electron, which changes the element
16
If you have 3 g of a parent element and 9 g of a daughter element. How many half-lives passed?
1 half-life
4 half-lives
3 half-lives
2 half-lives
17
What fraction of a parent element remains after 4 half-lives?
1/4
1/8
1/2
1/16
18
If you start with 16 grams of a radioactive element, how much will be left after 2 half-lives?
16 grams
8 grams
14 grams
4 grams
19
Which of the following is a reason elements become unstable and decay?
They're too small
proton-electron ration becomes lopsided
They're too large
The proton-neutron ratio becomes lopsided
20
If an atom has a half-life of 10 minutes, how many half-lives pass by during a 50 minute class?
1/5 of a half-life
3 half-lives
1 half-life
5 half-lives
21
In which type of decay does the parent element give off 2 protons and 2 neutrons?
Zeta Decay
Theta Decay
Alpha Decay
Beta Decay
22
How do people use radioactive decay and knowledge of half-lives to our benefit?
To help scientists look at past climates in ice core samples
We use ratio of parent/daughter elements to date objects
There's no real benefit to knowing about half-lives
