Question

Describe the electronic configuration of Na+ Mg2+ and Al3+ ions. Do they have the same number of electrons in the outermost shell?

Answer 1

*Electronic configuration*

1) Sodium (Na+)

Atomic no. = 11 → Electrons

1s²2s²2p⁶3s¹

2) Magnesium ( Mg2+ )

Atomic no. = 12 → Electrons

1s²2s²2p⁶3s²

3) Aluminium ( Al3+ )

Atomic no. = 13 → Electrons

1s²2s²2p⁶3s²3p³

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