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the number of protons in the nucleus of an atom, which determines which element it is. In a...

the radius of an atom from the nucleus to the outermost electrons.

states that the orbital with the lowest energy is the orbital that fills first.

a process whereby molecules combine automatically to form new ions as in the case of water.

hydrogen peroxide (H2O2) will spontaneously react (decompose) to form water and oxygen. One...

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