Simple molecular substances - Edexcel

1

How is a covalent bond formed?

2

What combination of elements will form covalent bonds?

3

What does this diagram of hydrogen chloride show about the bond being formed?

Dot and cross diagram of hydrogen chloride.

4

How many covalent bonds will phosphorous (in group 5) usually form?

5

Which of the following have molecules which are held together by three covalent bonds?

6

How many atoms are in a molecule of methane?

7

How many shared pairs of electrons are there in a water molecule, formula H2O?

8

Which statement about simple covalent molecules is correct?

9

Which is a typical property of covalent substances made from small molecules?

10

What force is overcome when covalent molecular substances melt or boil?