Covalent bonds - OCR 21C

1

Covalent bonds are usually formed between which type of atom?

2

How are electrons arranged in a covalent bond?

3

What does a displayed formula not show?

4

How many circles should be drawn in the dot and cross diagram for methane, CH4?

5

How many electrons should be drawn in an electron shell of a hydrogen atom?

6

How many electrons should be drawn in the outer shell of a chlorine atom?

7

Nitrogen has five outer electrons. How many hydrogen atoms can it form covalent bonds with?

8

How many electrons form a covalent double bond?

9

Which physical property is typical of a simple molecular substance?

10

Why do some simple molecular substances have higher boiling points than others?