Periodicity Flashcards
1
Q
Does atomic radius increase or decrease down period 3 and why?
A
Decreases; protons increase, increasing nuclear charge while shell number stays the same resulting in greater electrostatic attraction on outer electrons.
2
Q
Where and why does ionisation energy drop?
A
Aluminium- when outer electron in 3p subshell, at higher energy level so easier to remove
Sulfur - Electron pairing begins in 3p subshell, electrons repel so easier to remove
3
Q
What is Na-Al and what bonding?
A
Metals-metallic bonding
4
Q
What is si-al
A
Non-metals; silicon creates giant covalent structure
5
Q
What is P-Ar and what bonding is it?
A
Simple covalent bonding in non-metals.
