Radiation and half life (Periodic Table part 2)

light nuclei combine to form a heavier nucleus

What is the mass and charge of the alpha particle?

The time it takes for half of a sample to decay to products is called

The process of obtaining energy by splitting a large nucleus is called

When an unstable sodium- 24 undergoes beta decay, the nucleus formed is that of ___.

How many neutrons are there in Ca-42 ⁴² ₂₀ Ca?

A radoiactive sample has 1/8 of the original amount has undergone ____ half lives.

A radioactive sample has 50% of the orginal material. Each half life is 5 years. How much time has passed?

What is the mass and charge of the beta particle?

Which type of radiation has the least energy?

The process of obtaining energy by merging small nuclei is called

A radioactive sample has 25% of the orginal material. Each half life is 5 years. How much time has passed?

An amount of fissionable material that will sustain a chain reaction is called

Thermonuclear warheads, or hydrogen bombs, are powerful mainly because of the

How many nucleons are there in Ca-42 ⁴² ₂₀ Ca?

The amount of time for half the atoms in a radioactive sample to decay is

When an unstable sodium- 24 undergoes gamma decay, the nucleus formed is that of ___.

All isotopes have the

____ can only be stopped by lead or concrete.

Which type of radiation has the most energy?

____ only can be stopped by metal (foil).

When an unstable sodium- 24 undergoes alpha decay, the nucleus formed is that of ___.

A halflife is 11 years for an isotope. What percent will be left after 33 years?

How many protons are there in Ca-42 ⁴² ₂₀ Ca?

What is the mass and charge of the gamma particle?

____ can be stopped by paper.

A radoiactive sample has 1/4 of the original amount has undergone ____ half lives.