The electronic configuration of three elements are as follows:
L: 1s² 2s² 2p⁶ 3s¹ M: 1s² 2s² 2p⁴ N: 1s² 2s² 2p⁶ 3s² 3p¹
Choose the correct formula for the ionic compounds formed by the given elements, where the cations are written first as usual.

Question

The electronic configuration of three elements are as follows:

L: 1s² 2s² 2p⁶ 3s¹ M: 1s² 2s² 2p⁴ N: 1s² 2s² 2p⁶ 3s² 3p¹

Choose the correct formula for the ionic compounds formed by the given elements, where the cations are written first as usual.

TestHub · Accepted Answer

According to electronic configuration the elements are

$L = 1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1} \Rightarrow Na$

$M = 1 s^{2}, 2 s^{2}, 2 p^{4} \Rightarrow O$

$N = 1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{1} \Rightarrow Al$

Hence formula of the ionic compound.

$N_{2} M_{3} \Rightarrow Al_{2} O_{3} L_{2} M \Rightarrow Na_{2} O$

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