Nuclear Chemistry

Question 1

(Nuclear Chemistry) Nuclei with these numbers of protons or neutrons are very stable and do not decay. The “magic numbers” are…

Answer 1

2, 8, 20, 28, 50, 82, 126

Question 2

(Nuclear Chemistry) Stability Trend

Answer 2

1. A nucleus with even numbers of both protons and neutrons.
   * Magic number of protons or neutrons.*
2. A nucleus with an even number of protons OR neutrons, not both.
3. A nucleus with odd numbers of both protons and neutrons.

1 is the most stable, 3 is the least.

Question 3

(Nuclear Chemistry) Half-life Equations

Answer 3

-kt = ln(0.5)-ln(1)

or

k = ln(2)/t

k: the rate constant
t: the half-life
ln: the natural log

Question 4

(Nuclear Chemistry) Beta decay occurs in…

Answer 4

isotopes with too many neutrons.

Question 5

(Nuclear Chemistry) Positron emission and electron capture occur in…

Answer 5

isotopes with too many protons.

Question 6

(Nuclear Chemistry) Alpha decay occurs MOST OFTEN in…

Answer 6

elements with more than 83 protons.