Atomic Structure and Electron Configuration

AP Chemistry· difficulty 2/5

The electron configuration of a neutral oxygen atom is

A
$1s² 2s² 2p⁴$
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B
$1s² 2s² 2p⁶$
C
$1s¹ 2s² 2p⁵$
D
$1s² 2s² 2p²$

Explanation

Oxygen has 8 electrons: 2 in 1s, 2 in 2s, 4 in 2p. Configuration 1s² 2s² 2p⁴.

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