Question

What are binary compounds ? How are formulae of these compounds' written ?

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Answer 1

A binary compound is a substance composed of exactly two different elements.

• A binary compound contains only two elements.

• The major types of binary compounds are ionic (compounds that contain a metal and a nonmetal) and nonionic (compounds containing two nonmetals).

The substances which are formed cannot be simplified further by chemical means.

Examples of binary compounds include H₂O, H₂S, and NH₃

• Binary ionic compounds are named by writing the metal ion first, followed by the nonmetal.
• Ionic compound formulas are written using the lowest ratio of ions.
• If the metal has only one ion, then the Roman numeral is not necessary.

• The order for names in a binary compound is first the cation, then the anion.
• Use the name of cation with a fixed oxidation state directly from the periodic table.

Answer 2

Answer:

Binary ionic compounds are named by writing the metal ion first, followed by the nonmetal. If the metal has only one ion, then the Roman numeral is not necessary. Also, Greek prefixes are not used when naming ionic compounds.

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