Nuclear Equations and Half Life problems

Front

What is the atomic number of Neptunium (Np)?

Back

93

Front

What is the remaining mass of radioactive C-14 after 1 half-life if you start with 100 grams?

Back

50 grams

Front

What is the half-life of C-14?

Back

5730 years

Front

What is the half-life of strontium-90?

Back

25 years

Front

How much strontium-90 remains after 100 years if the initial amount is 4.0 g?

Back

0.25 g

Front

What is the equation for alpha decay of polonium-214?

Back

C

Front

What is beta decay?

Back

A type of radioactive decay in which a beta particle (electron or positron) is emitted.

Front

What is the product of the beta decay of Carbon-14?

Back

Nitrogen-14 (7^14N)

Front

How do you calculate the remaining mass after multiple half-lives?

Back

Remaining mass = Initial mass × (1/2)^(number of half-lives)

Front

What is a half-life?

Back

The time required for half of the radioactive atoms in a sample to decay.