Radioactive Decay & Half-life Test

Front

What type of radiation has the highest penetrating power and can penetrate the human body?

Back

Gamma radiation.

Front

What is the product of the alpha decay of 209At? Solve the equation: 8_5^209At = ___ + 2_4^He

Back

83_205Bi.

Front

If element 28X^58 undergoes alpha decay, what is the resulting element Y?

Back

26Y^54.

Front

How much of a 10 mg sample of iodine-131 remains after 24 days if its half-life is 8 days?

Back

1.25 mg.

Front

How long does it take for 180 grams of gold-198 to decay to 11.25 grams if its half-life is 2.68 days?

Back

10.72 days.

Front

Define radioactive decay.

Back

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

What is half-life in the context of radioactive decay?

Back

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

Front

What are the three main types of radiation?

Back

Alpha, Beta, and Gamma radiation.

Front

What is alpha decay?

Back

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, consisting of 2 protons and 2 neutrons.

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.