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kotegsom [21]
3 years ago
10

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryll

ium. Which element is element X?
sodium (Na)
boron
b. magnesium (Mg)
lithium (Li)
Physics
2 answers:
8090 [49]3 years ago
7 0
Mg magnesium becuase one period down and one group to the side

N76 [4]3 years ago
4 0

The answer is C (magnesium (Mg)


tornadolove102
3 years ago
thank you
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