Question

Chemistry help please

Answer 1

@vocaloid

Answer 2

You're given two positive ions and two negative ions

Generally, an ionic compound is made from one positive and one negative ion

So, you have 4 combinations to consider. Write the positive ion, then the negative ion. You also need to balance out charges.

I'll demonstrate using one possible combination.

Pb4+ , and ClO3-

The Pb4+ has a +4 charge, and the ClO3- has a -1 charge
So we need 4 ClO3- ions to balance out the +4 charge. We represent this by putting a set of parentheses around ClO3-, and adding a 4 subscript.

So finally: \[Pb(ClO_{3})_{4}\]
is your ionic compound. Notice since, the overall compound is neutral, we don't write the charges.

Try to repeat with the other 3 options.