Valency and Formula writing

Question 1

Name the valency number on each group on the periodic table

Answer 1

Group 1: 1
Group 2: 2
Group 3: 3
Group 4: 4
Group 5: 3
Group 6: 2
Group 7: 1
Group 0: None

Question 2

Name some transition metals and their valency

Answer 2

Iron: 2 or 3
Copper: 1 or 2
Zinc: 2

Question 3

What is the valency of a molecule?

Answer 3

The number that shows how each element bonds with another element to make compounds. It also shows the number of bonds each element can make in a molecule