Chapter 3

Question 1

electrostatic force

Answer 1

attractive or repulsive force between particles due to their electric charges

Question 2

Metallic bonding

Answer 2

positively charged metal cations in a sea of delocalised electrons.

Question 3

Properties of metals

Answer 3

good conductors of heat due to the mobile electrons, good conductors of electricity due to the delocalised electrons, and high-density substances because their lattices are close packed

Question 4

Reactivity of metals

Answer 4

Reactivity decreases across the periods and increases down a group of the periodic table. The reactivity of a metal is dependent on its ability to lose electrons.

Question 5

Ore

Answer 5

a rock containing minerals from which a valuable metal can be removed for profit

Question 6

Reactions of metals with water

Answer 6

metal + water → metal hydroxide + hydrogen gas

metal + steam → metal oxide + hydrogen gas

Question 7

Reactions of metals with acids

Answer 7

metal + acid → salt + hydrogen gas

Question 8

Reactions of metals with oxygen

Answer 8

metal + oxygen → metal oxide