Types of Decay
Isotopes
Decay Equations
Half-Lives <3
Faass Facts
100
What type of decay causes an element to lose 2 protons and 2 neutrons?
Alpha Decay
100
What is the mass of the following isotope?
63
100
What type of decay equation is this?
Beta Decay
100
A sample undergoes a single half-life, what percentage of the original sample remains?
50%
100
What is Mr. Faass' first name?
Tim/Timothy
200
What type of decay causes a neutron to turn into a proton and releases an electron?
Beta Decay
200
How many protons are in the isotope Germanium-75
32
(Use the periodic Table)
200
What type of decay does not change the mass, but the protons increase by 1?
Beta Decay
200
If only 25% of a sample is left, how many half-lives have gone by?
2
200
How did Mr. Faass travel to work today?
He walked?
300
What type of decay can be blocked by paper?
Alpha
300
How many neutrons are in the isotope Tin-120?
70
Mass (120) - Protons (50)
300
Write an alpha decay equation for this isotope
35 4 30
Cl --> He + P
17 2 15
300
What is the half-life of carbon-14
5730 years
300
True or False: Mr. Faass Preordered COD
True
400
What type of decay can be blocked by lead and aluminum?
beta decay
400
Draw an isotope symbol for Titanium-46
46
Ti
22
400
Write the beta decay equation for the following isotope:
131 0 131
I ---> e + Xe
53 -1 54
400
What percentage of Carbon-14 is left after 11,400 years?
25%
400
What school does Mr. Faass currently go to for graduate school?
Johns Hopkins
500
Why do atoms decay?
To become stable/
to lose energy
500
Write the isotope symbol for an element with 46 neutrons and 36 electons
82
Kr
36
500
Draw the alpha equation for the isotope Gallium-72
72 4 68
Ga --> He + Cu
31 2 29
500
How many half-lives have passed at 17,190 years?
3 half-lives
500
What did Mr. Faass' parents do for a living?
Police officers