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Chapter 8: Problem 17

Predict the chemical formula of the ionic compound formed between the following pairs of elements: (a) Al and F, (b) K and \(S,(\mathbf{c}) \mathrm{Y}\) and \(\mathrm{O},(\mathbf{d}) \mathrm{Mg}\) and \(\mathrm{N} .\)

Short Answer

Expert verified
The chemical formulas of the ionic compounds formed between the given pairs of elements are: (a) AlF₃, (b) K₂S, (c) Y₂O₃, and (d) Mg₃N₂.

Step by step solution

01

(a) Al and F

Al forms a +3 ion (Al³⁺) and F forms a -1 ion (F⁻). To make it a neutral compound: Al³⁺ + 3 F⁻ → AlF₃ So, the chemical formula of the ionic compound formed between aluminum (Al) and fluorine (F) is AlF₃.
02

(b) K and S

K forms a +1 ion (K⁺) and S forms a -2 ion (S²⁻). To make it a neutral compound: 2 K⁺ + S²⁻ → K₂S So, the chemical formula of the ionic compound formed between potassium (K) and sulfur (S) is K₂S.
03

(c) Y and O

Yttrium (Y) forms a +3 ion (Y³⁺) and oxygen (O) forms a -2 ion (O²⁻). To make it a neutral compound: 2 Y³⁺ + 3 O²⁻ → Y₂O₃ So, the chemical formula of the ionic compound formed between yttrium (Y) and oxygen (O) is Y₂O₃.
04

(d) Mg and N

Magnesium (Mg) forms a +2 ion (Mg²⁺) and nitrogen (N) forms a -3 ion (N³⁻). To make it a neutral compound: 3 Mg²⁺ + 2 N³⁻ → Mg₃N₂ So, the chemical formula of the ionic compound formed between magnesium (Mg) and nitrogen (N) is Mg₃N₂.

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Most popular questions from this chapter

(a) Construct a Lewis structure for hydrogen peroxide, \(\mathrm{H}_{2} \mathrm{O}_{2}\) in which each atom achieves an octet of electrons. (b) How many bonding electrons are between the two oxygen atoms? (c) Do you expect the \(\mathrm{O}-\mathrm{O}\) bond in \(\mathrm{H}_{2} \mathrm{O}_{2}\) to be longer or shorter than the \(\mathrm{O}-\mathrm{O}\) bond in \(\mathrm{O}_{2} ?\) Explain.

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