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Metals and Non-metals

Name two metals which are found in nature in the free state.

Metals and Non-metals

Define the following terms.
(i) Mineral (ii) Ore (iii) Gangue
Name two metals which are found in nature in the free state.

3. What chemical process is used for obtaining a metal from its oxide?

Metals and Non-metals

Why do ionic compounds have high melting points?

Metals and Non-metals

(i) Write the electron-dot structures for sodium, oxygen and magnesium.
(ii) Show the formation of Na2O and MgO by the transfer of electrons.
(iii) What are the ions present in these compounds?

Metals and Non-metals

What would you observe when zinc is added to a solution of iron(II) sulphate? Write the chemical reaction that takes place.

Metals and Non-metals

Which gas is produced when dilute hydrochloric acid is added to areactive metal? Write the chemical reaction when iron reacts with dilute
H2SO4.

Metals and Non-metals

Write equations for the reactions of
(i) iron with steam
(ii) calcium and potassium with water

Metals and Non-metals

Why is sodium kept immersed in kerosene oil?

Metals and Non-metals

Explain the meanings of malleable and ductile.

Metals and Non-metals

Give an example of a metal which
(i) is a liquid at room temperature.
(ii) can be easily cut with a knife.
(iii) is the best conductor of heat.
(iv) is a poor conductor of heat.