Name_____________________________________________ Date_________________Block______________
How Many Ions?
Each of the following pairs of ions needs to be neutral when in a compound. To do this, determine the least number of each ion that would
result in a net charge of “zero”, if the total number of charges were added together.
Fill in both BLUE columns 1st, then both RED columns, then do the GREEN column last!
1. Use your periodic table of ions to find the ion symbol and charges of each ion.
2. Write the number of ions needed for each element on the line to the left of the name.
3. Write the chemical formula for each neutral compound
Ion #1
1. Ion
Symbol &
Charge
Number Of Ions
needed for
neutral pair
Ion #2
1.Ion
Symbol &
Charge
Number Of Ions
needed for
neutral pair
Chemical Formula
(NEUTRAL- no charges)
EX
sodium
Na+
1
chloride
Cl-
1
NaCl
1.
potassium
oxide
2.
aluminum
oxide
3.
iron(II)
nitride
4.
iron(II)
sulfate
5.
sodium
sulfate
6.
aluminum
nitrate
7.
magnesium
hydroxide
8.
potassium
hydroxide
9.
potassium
sulfate
Ion #1
1. Ion
Symbol &
Charge
Number Of Ions
needed for
neutral pair
Ion #2
10. calcium
oxide
11.
chloride
calcium
12. calcium
nitride
13. calcium
hydroxide
14. hydrogen
sulfate
15. hydrogen
phosphate
16. hydrogen
hydroxide
17. iron(II)
oxide
18. iron(II)
hydroxide
19. aluminum
hydroxide
20. aluminum
phosphate
1.Ion
Symbol &
Charge
Number Of Ions
needed for
neutral pair
Chemical Formula
(NEUTRAL- no charges)