Charge = number of proton - number of electron = 18-22 = -4
SO, OPTION A IS YOUR ANSWER........
Answer:

Explanation:
The reaction is a precipitation reaction. In other words, the two aqueous solutions react to give the solid salt, potassium chloride (KCl) in this case.

Because the reaction product is a solid, the net ionic equation can be written as:

This is the resultant equation after removing spectator ions: sulfate and strontium.
Answer:
hydrogen builds many acids but not all