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Question 11 Mark

The name of Li₃N is lithium nitrite.

Answer

True.
Explanation:
Lithium nitride is a compound with the formula Li₃N. It is the only stable alkali metal nitride. The solid is a red or purple color and has a high melting point.

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Question 21 Mark

A chloride ion has negative charge because it has more electrons than a neutral atom.

Answer

True.

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Question 31 Mark

A sodium ion has positive charge because it has more protons than a neutral atom.

Answer

False.

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Question 41 Mark

One mole of sodium sulphate contains 2 atoms of Na, 1 atom of S, 4 atoms of oxygen.

Answer

False

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