Unit 7- LA 5

Question 1

How is atomic radius calculated?

Answer 1

Calculated based on distances between nuclei bonded together in molecules

Question 2

Atomic radius of diatomic molecules

Answer 2

Equal to covalent radius (one-half the distance between nuclei)

Question 3

Atomic radius of metals

Answer 3

Equal to metallic radius (one-half the distance between nuclei in metal lattice)

Question 3

Ions Atomic radius

Answer 3

Equals one-half the distance between ions in ionic crystal lattice

Question 4

Atomic Radii trends

Answer 4

• Increases going down a family (Inner shell electrons “shield” outer layers, decreasing the effective nuclear charge)
• Decreases going across a row