Electrons - Negatively charged, no mass, Protons - positively charged mass, atomic number, and identity, Neutrons - Neutral charge, mass, Isotope - Atoms of the same element with different amount of neutrons, Radioactivity - for an atom to be radioactive, it need approximately 30% more neutrons than protons, Calculating if an atom is radioactive - Difference/Atomic # x 100, Fission - Splits a larger atom into 2 or more lighter ones, Fusion - Joins 2 or more lighter atoms into a larger one, Half-life - The time taken for 1/2 of the mass of an isotope to break down, Radioactive stability - the release of particles by a radioactive isotope to achieve stability, Ions - When an atom loses 1, 2, or 3 electrons, it becomes positive. When atoms gain 1, 2, or 3 electrons, they become negative, Covalent Bond - When atoms share outer shell electrons with non-metals, Columns - Groups, Rows - Periods, Law of conservation of mass - No atoms can be created or destroyed,

Chemistry

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