Question

What are an ionic formulas?

Answer 1

Ionic formulas are ions that are held together by electrostatic attraction.

Explanation:

Given: What are ionic formulas?

Ionic crystals have ionic formulas. They are held together by electrostatic attraction .

There is a positive ion known as a cation attracted to a negative ion called an anion. The positive or negative ion can be polyatomic (an ion that is a group of ions that together have a positive or negative charge).

Ionic formulas are not a molecular formula, they are what is called a formula unit, a ratio of ions.

Examples:

`ul(" Name formula unit ions ")`
sodium chloride: `" NaCl (salt) "Na^+ " "Cl^-`
calcium chloride: `" "CaCl_2 " "Ca^(+2) " "Cl^-`
barium oxide: `" "BaO " "Ba^(+2) " "O^(-2)`
iron (III) bromide: `" "FeBr_3" "Fe^(+3) " "Br^-`
ammonium sulfide:`" "(NH_4)_2S" "NH_4^+" "S^-2`
ammonium carbonite:`(NH_4)_2CO_2 " " NH_4^+" "CO_2^-2`

Answer 2

Ionic formulae represent ionic compounds....i.e. they represent a definite chemical entity, a salt.

Explanation:

And ionic compounds are collections of ANIONS and CATIONS such that the resultant charge of the collection, the compound or salt, is ZERO... And so we could take a metal ion, say `M^(2+)`, and marry it up to a collection of anions....i.e. `X^-`, `CO_3^(2-)`, `NO_3^-`, `ClO_4^(-)`, `HPO_4^(2-)`...to give ionic salts WHICH ARE NEUTRAL...i.e. `MX_2`, `MCO_3`, `M(NO_3)_2`, `M(ClO_4)_2`, `MHPO_4`...