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QUESTION

How to name binary ionic compounds?

the name for binary A_mB_n is "A B-ide" or "A (Roman numeral) B-ide"

All binary ionic compound have a general formula of A_mB_n A is the cation or the metallic ion. B is the anion or the non-metallic ion.

If the cation or the metallic ion is an element that can only have one charge (i.e. all the alkali metals and Alkaline earth metals in group 1 and 2 and some of other metallic elements) then you use the following method: Write the full name of element A at the front, leave a space, then write root word of the name of element B then without space next to it write the suffix "ide" e.g. Na is sodium Cl is chlorine . The root word of chlorine is chlor Therefore NaCl is called Sodium Chloride

If the cation or the metallic ion is an element that can have more than one charge (i.e. lots of the transition metals in group 3 to 12 and so other ) then you use the following method: Write the full name of element A at the front, without space, write the charge of A in Roman numeral in bracket, leave a space, then write root word of the name of element B then without space next to it write the suffix "ide" e.g. Fe is iron . It has a charge of +3 in this compound. O is oxygen . The root word of oxygen is ox Therefore Fe_2O_3 is called Iron(III) oxide