3.3.2 Ionic Formulae

Question 1

How are ion charges and groups in the periodic table linked?

Answer 1

Ions from the same periodic table group have the same charge.

Question 2

In any ionic compound, the charges…

Answer 2

…balance, positive = negative.

Question 3

What is the formula for sodium iodide?

Answer 3

NaI

Question 4

What is the formula for Iron(III) Oxide?

Answer 4

Fe2O3

Question 5

What is the formula of Ammonium?

Answer 5

NH4+

Question 6

What is the formula of Hydroxide?

Answer 6

OH-

Question 7

What is the formula of Nitrate?

Answer 7

NO3-

Question 8

What is the formula of Carbonate?

Answer 8

CO3-2

Question 9

What is the formula of Sulphate?

Answer 9

SO4-2

Question 10

What is the formula of phosphate?

Answer 10

PO4-3

Question 11

What are the ionic charges you can’t work out from the periodic table?

Answer 11

-Fe2+
- Fe3+
- Cu2+
-Ag+
-Zn2+
-Pb2+