Name the two elements having 7 electrons in their outermost shell.
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Answer: Fluorine
Chlorine
Explanation:
F(z=9)
Has e.c 1s2 2s2 2p5
Outermost shell has (2+5) = 7 electrons
Cl (z=17)
Has e.c 1s2 2s2 2p6 3s2 3p5
Outermost shell has (2+5) =7 electrons
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