2.1 Periodicity Flashcards

1
Q

What are the trends in electrical conductivity in Period 3?

A
Increase Na to Al
Decrease Al to Ar
Al> Mg> Na as metallically bonded with increased delocalised electrons
Si is a semiconductor
P,S,Cl,Ar have no delocalised electrons
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the trends in atomic radii in Period 3?

A

Decreases as protons increase
outer electrons in same shell
Stronger pull due to more protons pulling the electrons closer to the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the trends in electronegativity in Period 3?

A

Increases as protons increase
smaller atoms
stronger attraction from nucleus to 2 electrons in a covalent bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the trends in melting and boiling points in Period 3?

A
Decreases
Na, Mg, Al- stronger metallic bonds
Si, Giant covalent
P,S,Cl- simple molecular with weak van de waals
Ar- monoatomic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the trends in ionisation energy in Period 3?

A

Increases as protons increase
smaller atoms
stronger attraction from nucleus to outer electrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly