Ions

Question 1

When do Ions form?

why?

Answer 1

atoms lose or gain electron(s )

to fill outer shell become charged particles

Question 2

negative ions = _______ electrons

positive ions=__________electrons

Answer 2

gain

lose

Question 3

Which groups are most likely to form ions?

Answer 3

1 ,2,6,7

Question 4

Explain the link between group number and charge on atoms

Answer 4

group 1 = 1+
2=2+
group number tells you charge BUT 
(group 6 & 7)=8 - (group number)=ion charge
6=2-
7=1-

Question 5

Trick to working out formula of ionic compound

Answer 5

swap the charges around
example : Li 1+ + O 2-
= Li2O