Consider the ionic compound that is the combination of the chromium (iii) and hydroxide ions. how many chromium atoms would be present in this compound?

An ionic compound forms when a metal bonds with a non-metallic element. Metals usually form the cation and non-metal anions. Chromium has an oxidation number of +3 in the compound and charge on hydroxide ion is -1.

Cation here is

Anion is the hydroxide ion

So the formula of the compound will be: . The compound has one chromium atom and two hydroxide ions.

Therefore, there will be one Chromium atom per each chromium hydroxide compound.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

thats a little if u want the answer just look it up on google thats what i do haha : )