Gp 2- Physicsl Properties

Question 1

General description:

Down the gp

Answer 1

• higher no of electronic shells;
• increase in SE outweighs increase in NC;
• ENC decreases;

->amt of energy req to remove valence e decreases

Question 2

How are the following properties being affected?

1. atomic radii
2. ionic radii
3. first IE
4. electronegativity

Answer 2

1. atomic radii: increases
2. ionic radii: increases
3. first IE: decreases
4. electronegativity: decreases

Question 3

MP?

Answer 3

Decreases

• giant ionic lattice + e.f.a
• radius increases and distance bt sea of mobile e and nucleus increase;
• charge density decreases due to increase in cation size;
• weaker attraction bt metal cation and sea of delocalised e;
• weaker metallic bonds;

=>amt of energy..

Question 4

Atomic/ ionic radii?

Answer 4

Increases;

No of protons in nucleus increases;
NC increases;

No of e shells increase;
SE increases;

SE>NC;

Attraction on valence electrons decreases