Nuclear Chemistry-2023

Front

What happens to the atomic number during alpha decay?

Back

The atomic number decreases by 2.

Front

What is the half-life of technetium-99?

Back

6.0 hours.

Front

How much technetium-99 remains after 18 hours if 100.0 mg were injected?

Back

12.5 mg.

Front

What is part of lab safety?

Back

Reading the lab procedure before doing the lab.

Front

Which type of radiation has the greatest penetrating power?

Back

Gamma radiation.

Front

What is the missing isotope in the equation: 9_4Be + 1_1H → _____ + 4_2He?

Back

6_3Li.

Front

Define alpha decay.

Back

A type of radioactive decay where an atomic nucleus emits an alpha particle, decreasing its atomic number by 2.

Front

What is a half-life?

Back

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

Front

What is the penetrating power of alpha particles?

Back

Alpha particles have low penetrating power and can be stopped by paper.

Front

What is the penetrating power of beta particles?

Back

Beta particles have moderate penetrating power and can be stopped by plastic or glass.