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NEET Chemistry
QUESTION #7383
Question 1
Magnesium reacts with element X (ground state configuration: \(1s^2\,2s^2\,2p^3\)) to form an ionic compound. The simplest formula of this compound is:
Correct Answer Explanation
Identifying X: \(1s^2\,2s^2\,2p^3\) = 7 electrons â Nitrogen (N)
Nitrogen needs 3 electrons to complete its octet â forms \(\text{N}^{3-}\)
Magnesium loses 2 electrons â forms \(\text{Mg}^{2+}\)
To balance charges: 3 Mg²⺠provide \(+6\), 2 N³⻠provide \(-6\)
Formula: \(\text{Mg}_3\text{X}_2\) (like \(\text{Mg}_3\text{N}_2\))
Nitrogen needs 3 electrons to complete its octet â forms \(\text{N}^{3-}\)
Magnesium loses 2 electrons â forms \(\text{Mg}^{2+}\)
To balance charges: 3 Mg²⺠provide \(+6\), 2 N³⻠provide \(-6\)
Formula: \(\text{Mg}_3\text{X}_2\) (like \(\text{Mg}_3\text{N}_2\))
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