Physics, 07.10.2019 06:30 lcyaire

An atom of element x has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. which element is element x?

sodium (na)

boron (b)

magnesium (mg)

lithium (li)

Answers: 2

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An atom of element x has one more shell of electrons than an atom of beryllium, but it has one less...