Periodicity Flashcards
1
Q
Define Periodicity
A
Repeating trends of physiical or chemical properties
2
Q
General trend of ionisation energy across period 3
A
Increases
3
Q
Which two element deviate from the eneral trend of ionisation energy across period 3
A
- Auminium
- Sulfur
4
Q
Why does aluminium deviate from the general trend of ionisation energy across period 3?
A
- outer electron is in 3p orbital
- 3p is higher in energy
- outer electron is more shielded than 3s
- easier to remove
5
Q
Why does sulfur deviate from the general trend of ionisation energy across period 3?
A
- outer electron is in 3p orbital
- outer electrons in 3p begin to pair
- so repel each other
- easier to remove
6
Q
A
