Question

1. Kinetic Theory of Matter: Fill in the table below. Use relative words (ex: largest, smaller, fastest, etc) to describe each property. Solids Liquids Gases Property Motion of atoms/molecules Density of atoms/molecules Intermolecular forces between atoms/molecules

Answer 1

Kinetic theory of matter:

Properties of solids, liquids and gases.

1. Motion of atoms/molecules:

Solids - The molecules in solids are tightly packed. They can vibrate but cannot move from their place due to lack of space between molecules.

Liquids - The molecules in liquids are close together. They vibrate and can move about and slide past each other.

Gases - The molecules in gases are well separated and move freely at high speeds.

2. Density of atoms/molecules:

Solids - The molecules in solids are tightly packed hence they have highest density among solids, liquids and gases.

Liquids - The molecules in liquids are close together but still have some space to move. Thus liquids are less dense than solids.

Gases - Molecules are well separated and thus gases have lowest density.

3. Intermolecular forces between atoms/molecules:

Solids - The intermolecular forces between the molecules are strong enough to keep them fixed in position. The intermolecular forces are strongest in solids among solids, liquids and gases.

Liquids - The intermolecular forces between the molecules are weaker than that in solids. Hence, the molecules can move past or slide over one another.

Gases - There is no significant attractive force between the molecules in gases. Hence, the molecules can move freely.