answer is A
The kinetic theory is used to explain the behaviour of gases.
One of the assumptions states that "a gas is composed of a large number of identical molecules moving at different speeds".
Ice melts when heat energy causes the molecules to move faster, breaking the hydrogen bonds between molecules to form liquid water.
The mineral that is the hardest known substance in nature is a diamond.
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Quantitative data is numerical.
Qualitative data is non-numerical.
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Gold has 79 protons on the periodic table
