stable element in 2nd energy level, most reactive element with 1 valence electron in the second energy level, group 13 element with 4 energy levels, group 13 element in period 2, reactive alkali metal with in period 7, highly reactive element with 7 valence electrons and 2 energy levels, element with 5 energy levels that is most reactive, 2 valence electrons and 5 energy levels, non-reactive element with 6 shells, highly reactive element with 6 orbitals, metal with 2 valence electrons and 6 energy levels, non metal in period 4, same reactivity as Nitrogen, atom with a full valence shell of two electrons, shares the same energy levels as Na but same reactivity as He, transitional metal , metalloid with the same energy levels as element 13.

Periodic Trends

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