Periodicity, group 2 and 7

Question 1

atomic radius

Answer 1

• atomic radius gets larger as go down the group
• extra electron shells added as go down

Question 2

First ionisation energy

Answer 2

• all have 2 electron in their outer shell
• can lose 2 electron to form 2+ ions

first ionisation eng dec down the group
- extra inner shells shild
- outer electron further away from nucleus

Question 3

Reacitivity group 2

Answer 3

more as go down
- easier ele lose electron nmore reactive it is