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a zigzag, stepped line on the periodic table that separates the metals from the non-metals.
a very reactive atom or group of atoms with an unpaired valence electron.
dealing only with the nature, and not with the specific amounts of the substance under...
the levels of energy in which electrons move and which have fixed amounts of energy.
the energy released when a nucleus is formed from its component particles.
when energy is added to an electron in the lowest energy state (the ground state) and it jumps...