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The electron configuration of a neutral (i.e., uncharged) atom is ${1s}^2{2s}^2{3s}^1$.

Which of the following statements is TRUE?

A periodic table is provided for reference.

A

It is an excited state of boron (B).

B

It is the ground state of sodium (Na).

C

It is an excited state of sodium (Na).

D

It is the ground state of boron (B).

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