Lesson 4: Physical & Chemical Property Trends

Question 1

Density

Answer 1

1. Across the period- Increases gradually and later decreases slightly
2. Down the group- Increases

Question 2

Melting & Boiling Points

Answer 2

1. Across the period- m.p. increases gradually and later decreases slightly
2. Down the group- m.p. & b.p. decrease gradually

Question 3

Oxides

Answer 3

1. Across the period- Strongly basic to strongly acidic
2. Down the group- Acidic to basic

Question 4

Hydroxides

Answer 4

1. Across the period- Strongly basic to amphoteric
2. Down the group- Less basic to strong basic

Question 5

Oxyacids

Answer 5

1. Across the period- Weak oxyacids to strong oxyacids
2. Down the group- Strong oxyacids to weak oxyacids

Question 6

Hydrides

Answer 6

1. Across the period- Strongly basic to strongly acidic
2. Down the group- Less acidic to strongly acidic