How can you represent the composition of an ionic compound?

Answer 1

By the ratio of cations to anions in the empirical formulae.

As non-molecular species, ionic compounds are represented by their empirical formulas, which are straightforward whole number ratios.

Of course, ionic species are electrically neutral (most matter is of course electrically neutral). So when the alkali metals form an ionic compound with the halogen species, because the alkali metals readily form a #M^+# ion, they draft #X^-# halide ions to form the salt #M^+X^-#. Chalcogens, oxygen, and sulfur, etc. form dianionic ions, #O^(2-), S^(2-),#. To form neutral salts with the alkali metals, 2 cations must be drafted: #Na_2O, Na_2S#.
For the following cations, #Na^+#, #Ca^(2+)#, and #Al^(3+)#, can you formulate the ionic compounds formed with the #I^-#, #NO_3^-#, and #PO_4^(3-)# anions? Remember that electrical neutrality is the key.
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Answer 2

For example, the formula for sodium chloride is NaCl, where there is one sodium ion (Na⁺) for every one chloride ion (Cl⁻). The composition of an ionic compound is represented by its chemical formula, which shows the ratio of the ions present in the compound. Typically, the formula is written with the cation (positively charged ion) first, followed by the anion (negatively charged ion), with subscripts indicating the ratio of each ion in the compound.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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