Nuclear Chemistry

Front

What is the symbol for Beta radiation?

Back

β (Beta) is represented by the symbol β.

Front

What is the symbol for Alpha radiation?

Back

α (Alpha) is represented by the symbol α.

Front

What is the symbol for Gamma radiation?

Back

γ (Gamma) is represented by the symbol γ.

Front

What is alpha decay?

Back

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (2 protons and 2 neutrons), resulting in a new element.

Front

What is beta decay?

Back

Beta decay is a type of radioactive decay in which a beta particle (an electron or positron) is emitted from an atomic nucleus.

Front

What is gamma decay?

Back

Gamma decay is the release of gamma radiation from a nucleus, often following alpha or beta decay, without changing the number of protons or neutrons.

Front

Define half-life in nuclear chemistry.

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

If the half-life of a substance is 10 days, how much of a 100g sample remains after 30 days?

Back

After 30 days (3 half-lives), 12.5g of the sample remains.

Front

What fraction of a radioactive substance remains after 2 half-lives?

Back

1/4 of the original amount remains after 2 half-lives.

Front

What is the half-life of Uranium-238?

Back

The half-life of Uranium-238 is approximately 4.5 billion years.