Chapter 4.4

Question 1

Two definitions of atomic radius.

What are they?

Answer 1

Metallic and covalent radius
Metallic - distance between nucleus of two identical and adjacent metallic atoms DIVIDED by 2.
Covalent - distance between nucleus of identical and adjacent nuclei connected by chemical bond DIVIDED by 2.

Question 2

Trend of atomic radius:
Left to right
Up to down

Answer 2

Left to right: decrease in atomic radius

Up to down: increase in atomic radius