1.4 - Forming bonds

Question 1

What are compounds?

Answer 1

What is formed when elements combine

Question 2

What forms when a metal reacts with a non-metal?

Answer 2

Ions are formed

Question 3

Describe how an ionic bond is formed (4)

Answer 3

1) When a metal reacts with a non-metal, ions are formed
2) Metal atoms lose one or more electrons to form positively charged ions
3) Non-metals ions gain electrons to form negatively charged ions
4) The oppositely charged ions attract each other strongly and the compound has ionic bonds

Question 4

What does the chemical formula of an ionic bond tell us?

Answer 4

The simplest ratio of ions in the compound

Question 5

What does the chemical formula NaCl tell us about the ionically bonded sodium chloride?

Answer 5

Sodium chloride is made from equal numbers sodium and chloride ions

Question 6

What does the chemical formula CaCl2 tell us about the ionically bonded calcium chloride?

Answer 6

For every one calcium atom, there are two chloride atoms

Question 7

What happens when non-metals combine?

Answer 7

Their atoms share electrons to form covalent bonds

Question 8

What forms when a non-metal reacts with a non-metal?

Answer 8

Molecules are formed

Question 9

What does the chemical formula of a molecule tell us?

Answer 9

The number of atoms that have bonded together in the molecule

Question 10

What can covalent bonds be shown as in diagrams?

Answer 10

Lines between the atoms bonded together

Question 11

What does the chemical formula C3H8 tell us about the covalently bonded propane?

Answer 11

It is made of three carbon atoms and eight hydrogen atoms