What is the correct electron configuration for magnesium?

Question

What is the correct electron configuration for magnesium??  
A. 1s² 2s²  
B. . 1s² 2s² 2p⁶  
C. 1s² 2s² 2p⁶ 3s²  
D. 1s² 2s² 2p⁶ 3s² 3p¹

Accepted Answer

Correct Answer: (C)1s² 2s² 2p⁶ 3s². 
Rationale: The correct electron configuration for magnesium is 1s² 2s² 2p⁶ 3s².Magnesium has an atomic number of 12, which means a neutral magnesium atom contains 12 electrons. Electrons occupy orbitals in order of increasing energy according to the Aufbau principle. Lower-energy orbitals fill first, and higher-energy orbitals fill only after the lower ones are complete. The filling order is 1s, 2s, 2p, 3s, then 3p.A. 1s² 2s² It accounts for only 4 electrons. This configuration corresponds to beryllium, not magnesium.B. 1s² 2s² 2p⁶ It accounts for 10 electrons, which is the electron configuration of neon, a noble gas.C. 1s² 2s² 2p⁶ 3s² Adding the electrons gives a total of 12 (2 + 2 + 6 + 2). After filling the 2p subshell, the remaining two electrons occupy the 3s orbital. This configuration is often written in shorthand form as [Ne] 3s² and reflects magnesium’s position in Group 2 of the periodic table.D. 1s² 2s² 2p⁶ 3s² 3p¹ It includes 13 electrons and represents aluminum, not magnesium.ConclusionMagnesium’s 12 electrons fill orbitals up to the 3s subshell, giving the complete ground-state electron configuration 1s² 2s² 2p⁶ 3s².

What is the correct electron configuration for magnesium?

A
1s² 2s²

B
. 1s² 2s² 2p⁶

C
1s² 2s² 2p⁶ 3s²

D
1s² 2s² 2p⁶ 3s² 3p¹

The correct electron configuration for magnesium is 1s² 2s² 2p⁶ 3s².

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What is the correct electron configuration for magnesium?

A 1s² 2s² B . 1s² 2s² 2p⁶ C 1s² 2s² 2p⁶ 3s² D 1s² 2s² 2p⁶ 3s² 3p¹

The correct electron configuration for magnesium is 1s² 2s² 2p⁶ 3s².

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A
1s² 2s²

B
. 1s² 2s² 2p⁶

C
1s² 2s² 2p⁶ 3s²

D
1s² 2s² 2p⁶ 3s² 3p¹