Which of the following electron configurations represents that of an atom in its ground state?
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A.
1s 22s12p1
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B.
1s22s22p63s13p1 -
C.
1s22s12p3 -
D.
1s22s22p63s0
Correct Answer: Option C
Explanation
An excited-state atom is an atom in which the total energy of the electrons can be lowered by transferring one or more electrons to different orbitals. That is, in an excited-state atom not all electrons are in the lowest possible energy levels.