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Question 1

the more reactive a metal is

Answer 1

the more vigorous its reactions are and the more easily it loses electrons in reactions to form positive ions (cations)

Question 2

Formula when a metal reacts with water, a metal hydroxide and hydrogen are formed.

Answer 2

Sodium + water → sodium hydroxide + hydrogen

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Question 3

Describe and explain the observations when a small piece of lithium is placed on the surface of a big container of water.

Answer 3

There is fizzing as the lithium reacts with the water to produce hydrogen gas. The colour of the universal indicator changes from green to purple as an alkaline solution of lithium hydroxide is produced.

Question 4

What happens when a metal reacts with a dilute acid

Answer 4

a salt and hydrogen are formed.

Question 5

Fact about the reactivity series

Answer 5

Metals at the top of the reactivity series lose electrons more easily than metals at the bottom of the series

Question 6

What are the products of the reaction of magnesium with sulfuric acid?

Answer 6

Magnesium sulfate and hydrogen

Question 7

Which metal is found uncombined in the Earth’s crust?

Answer 7

Gold

Question 8

Which element removes oxygen from iron oxide in the industrial extraction of iron?

Answer 8

Carbon