The process in which multiple atomic nuclei combine producing large amounts of energy?

What is the amount of time required for HALF of a sample to decay or die off?

If we start with 400 atoms of a radioactive substance, how many would remain after four half-lives?

If we start with 300 atoms of a radioactive substance, how many would remain after two half-lives?

If we start with 2000 atoms of a radioactive substance, how many would remain after three half-lives?

If we start with 120 atoms of a radioactive substance, how many will remain after three halflives?________

What is this?

What is this?

If we start with 48 atoms of a radioactive substance, how many would remain after two half-lives?

If we start with 16 grams of a radioactive substance, how much will remain after three halflives?________

What are atoms of the same kind with a

different amount of neutrons than protons in

the nucleus of the atom?

A positively charged particle made up of two protons and two neutrons

An electron emmited by an unstable nucleus

A neutron decomposes into a proton and an electron

A penetrating ray of energy emmited by an unstable nucleus and has no charges and no mass

What is the process in which an unstable atomic nucleus emits charged particles and energy?

What are the particles or waves of energy given off when a nucleus goes through radioactivity decay?

What are these equations?

What are these equations?

______ particles can be can pass through paper but is stopped by

skin also is stopped by thin metal or wood

________ particles can be stopped by a sheet of paper.

________ particles can be

stopped by 7 cm of lead or several feet of concrete