Nuclear energy

2. the ability of an atom to emit mass and energy and radiation.
4. a chemical reaction or other process in which the products themselves promote or spread the reaction.
6. an element emits a Helium particle and changes the mass number by 4 and the atomic number by 2.
8. the time taken for the radioactivity of a specified isotope to fall to half its original value.
11. a reaction in which two or more atomic nuclei combine to form one or more different atomic nuclei and subatomic particles
12. the total number of protons and neutrons in a nucleus.
14. a positively charged subatomic particle with the same mass number as a neutron.

1. a type of nuclear decay in which gamma rays are emitted, this is the most dangerous type of nuclear decay.
3. a reaction in which the nucleus of an atom splits into two or more smaller nuclei.
5. the central core of an atom, consisting of protons and neutrons and containing nearly all its mass
7. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
9. forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
10. a type of radioactive decay in which an atomic nucleus emits a beta particle.
13. a neutrally charged subatomic particle with a mass number of 1