Radioactivity

2. The tiny building blocks which make up everything, are the physical embodiment of the elements and aren't visible to the naked eye.
5. "Working with radioactive substances poses a lot of ________."
6. A form of radiation which when emitted, lets loose particles which are identical to electrons, and one neutron is converted to a proton, this type of radiation. Can also be stopped by clothing or aliminium.
7. Particles in an atom which have a negative charge.
9. When an unstable atom is hit by neutron(s)and splits releasing a heap of energy, used in producing nuclear energy.
11. Particles in an atom which have a neutral charge.
12. Particles in an atom which have a positive charge.
13. A most commonly lethal disease which can be treated using radioisotopes and can be caused by nuclear fallout.

1. The most dangerous form of radiation, emitted as electromagnetic waves, caused when protons and neutrons rearrange. Can be stopped by several feet of concrete or a few inches of lead.
3. An isotope of an element that emits radiation when it decays.
4. Invisible radioactive particles which rain down and spread onto and throughout an area after a nuclear blast, which can cause many extra health risks and chances of death.
5. The time it takes for half of a radioisotope's nuclei to decay.
8. When two atoms are under heavy amounts of pressure or heat and join to make one. The opposite of nuclear fission.
10. An atom of the same element as another but has a different number of neutrons.
14. The weakest form of radiation, only poses a hazard if eaten or inhaled.