Electron Affinity/Negativity [C]

Question 1

What is electron affinity?

Answer 1

The change in energy when one mole of gaseous atom gains one mole of electron to form a negative ion.

(Indicates how strong the attraction is between an atom and electron)

Question 2

What is electronegativity? What does it depend on?

Answer 2

It’s a measure of the tendency of an atom to attract a bonding pair of electrons

Depends on:
- Number of protons
- Distance from nucleus
- How much shielding there is

Question 3

What is the difference between Affinity and Negativity?

Answer 3

Affinity - The strength of attraction to attract an electron

Negativity - The tendency to attract a bonding pair of electrons

Question 4

What can affect electron affinity?

Answer 4

• Proton Number
• Nuclear Charge
• Distance from Nucleus
• Shielding