Periodicity

Question 1

3 features of groups in the periodic table

Answer 1

• outer shell electrons are the same in each group
• columns in period
• more energy levels down the group

Question 2

3 features of periods in the periodic table

Answer 2

• outer shell electrons increase across a period
• rows in period
• same energy levels across a period

Question 3

Periodicity

Answer 3

The repeating pattern of chemical and physical properties across the rows of the periodic table

Question 4

Atomic radius trend in period 3

Answer 4

Nuclear charge ⬆️
Shielding stays the same
Nuclear attraction ⬆️
Atomic radius ⬇️

Question 5

General trend of ionisation energy across period 3

Answer 5

Nuclear charge ⬆️
Shielding stays the same
Atomic radius ⬇️
Nuclear attraction ⬆️
The first ionisation energy ⬆️ means the electron are harder to lose

Question 6

Why is there an interruption in general trend shown by aluminium in ionisation energy

Answer 6

P-drop = new sub level
Removing electron from p sub shell
P sub-shell is a higher energy than the s sub-level