Chemistry

4. A sublevel is an energy level defined by quantum theory
5. photons are bosons, having no electric charge or rest mass and one unit of spin
10. A balanced nuclear equation is one where the sum of the mass numbers (the top number in notation) and the sum of the atomic numbers balance on either side of an equation
11. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

1. is the emission of ionizing radiation
2. a positively charged ion, i.e. one that would be attracted to the cathode in electrolysis.
3. Alpha particles (a) are composite particles consisting of two protons and two neutrons tightly bound together
6. Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
7. radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
8. a quantum is the minimum amount of any physical entity involved in an interaction.
9. a negatively charged ion, i.e. one that would be attracted to the anode in electrolysis.