1.2.4, 1.2.6, 1.2.6 (Group 0, Group 1 And Group 7)

Question 1

Group 1 features (Alkaline metals)

Answer 1

• 1 electron in outer shell
• Extremely reactive
• Low density
• Alkaline metals
• Good conductors

Question 2

Group 0 features (Nobel gases)

Answer 2

• All shells are full
• Don’t react at all (monotomic)
• Nobel gases
  Colourless

Question 3

Group 7 features (Halogens)

Answer 3

• 7 electrons in outer shell
• most reactive non- metals
• Diatomic
• Coloured vapour
• Poor conductors
• Low melting and boiling point

Question 4

Diatomic elements

Answer 4

Hydrogen
Nitrogen
Oxygen
Group 7

Question 5

Chlorine colour

Answer 5

Green/yellow gas

Question 6

Bromine

Answer 6

Red/brown gas

Question 7

Iodine colour

Answer 7

Silver/grey solid

Question 8

Displacement in halogens

Answer 8

When a more reactive halogen will replace a less reactive halogen from its salt

Question 9

Reasons for reactivity increasing down Group 1 (4p)

Answer 9

• the size of the elements atoms increase
• There is an increased distance from the outer electrons to the nucleus because there are more shells
• the electrons aren’t as close to the protons in the nucleus so there is a weaker attraction
• This makes it easier for an electron to be lost

Question 10

Reasons for reactivity decreasing down Group 7 (4p)

Answer 10

• As you go down the table the amount of shells increase
• There is an increased distance between the protons in the nucleus and the outer electrons increases
• Therefore there is a weaker attraction from the positive nucleus towards the negative outer shell electrons
• This makes it more difficult to gain an electrons