Alloys, Uses and Reactivity

Question 1

Uses of metals

Answer 1

Vehicles, cutlery, jewellery, currency

Question 2

What is an alloy

Answer 2

A mixture of a metal with another element

Question 3

Two types of alloys

Answer 3

Interstitial and substitutional

Question 4

Describe a substitutional alloy

Answer 4

Atoms of the alloying agent replace the atoms of the main metal

Question 5

Describe an interstitial alloy

Answer 5

Atoms of the alloying agent slip in between the atoms of the main metal

Question 6

Suggest why alloys can be harder than normal metals

Answer 6

Because the different sized atoms prevent the layers from slipping over each other

Question 7

Three types of alloys

Answer 7

Bronze, stainless steel, brass

Question 8

What does a reaction with water form

Answer 8

Metal hydroxide and hydrogen

Question 9

What does a reaction with cold water form

Answer 9

Hydroxide

Question 10

What does a reaction with steam form

Answer 10

Metal and oxide

Question 11

What does a reaction with acid form

Answer 11

Hydrogen and salt

Question 12

What does a reaction with oxygen form

Answer 12

Metal oxide

Question 13

Why are some metals unreactive

Answer 13

Because of the formation of an oxide layer around it.