ionic bonding

Question 1

what is ionic bonding between?

Answer 1

metal and non metal

Question 2

what are ionic compounds ?

Answer 2

oppositely charged ions held together by electrostatic attractions

Question 3

what ions do group 1 form?

Answer 3

1+

Question 4

what ions do group 2 form?

Answer 4

2+

Question 5

what ions do group 3 form?

Answer 5

3+

Question 6

what ions do group 5 form?

Answer 6

3-

Question 7

what ions do group 6 form?

Answer 7

2-

Question 8

what ions do group 7 form?

Answer 8

1-

Question 9

what is the formula for the molecular ion hydroxide

Answer 9

OH-

Question 10

what is the formula for the molecular ion nitrate?

Answer 10

NO3-

Question 11

what is the formula for the molecular ion ammonium?

Answer 11

NH4+

Question 12

what is the formula for the molecular ion sulfate ?

Answer 12

SO4 2-

Question 13

what is the formula for the molecular ion carbonate?

Answer 13

CO3 2-

Question 14

swap and drop method: work out the formula of ionic compound

Answer 14

1. write the formula of 2 ions with charges
2. swap the charges around
3. drop the charges - so change it to outside a bracket in bottom right instead e.g (NO3) 2
4. simplify to lowest whole number ratio

Question 15

what structure do ionic compounds like sodium chloride have?

Answer 15

giant ionic structure

1. regular structure
2. cubic shape
3. giant repeating pattern

Question 16

why do most ionic compounds dissolve in water ?

Answer 16

as water molecules are polar they can attract the positive and negative ions and break up the structure

Question 17

why can ionic compounds conduct electricity when molten or dissolved?

Answer 17

because ions are free to move around and carry a charge

Question 18

when can ionic compounds conduct electricity?

Answer 18

when molten or dissolved

Question 19

why do ionic compounds have high melting points?

Answer 19

as there are many strong electrostatic forces between oppositely charged ions. lots of energy is needed to overcome these forces