Index Topics

The Particle Model of Matter states that:

• Matter is made up of tiny particles that are in constant motion.

• Matter is continuous and not made of particles.

• Particles in matter are always stationary.

• Matter cannot change its state.

Classify substances based on their composition.

• Elements and compounds

• Acids and bases

• Metals and nonmetals

• Organic and inorganic

Which of the following best distinguishes between pure substances, solutions, and mechanical mixtures?

• Pure substances have only one type of particle, solutions are uniform mixtures of two or more substances, and mechanical mixtures are non-uniform mixtures.

• Pure substances and solutions are both non-uniform, while mechanical mixtures are uniform.

• Solutions and mechanical mixtures both have only one type of particle, while pure substances have multiple types.

• Mechanical mixtures are uniform, solutions are non-uniform, and pure substances are mixtures.

All matter is composed of tiny particles called _______.

• atoms

• cells

• molecules

• ions

Atoms can combine together in different ways to form: What is the correct answer?

• Elements

• Molecules

• Compounds

• Mixtures

Based on the images and captions, which of the following statements is true?

• Alkali metals are not reactive

• Noble gases are extremely reactive

• Alkali metals are extremely reactive

• Both alkali metals and noble gases are extremely reactive

According to the Particle Model of Matter, all matter is made up of extremely ________ particles.

• tiny

• large

• heavy

• visible

According to the Particle Model of Matter, there are ________ between the particles.

• spaces

• bonds

• forces

• collisions

According to the Particle Model of Matter, particles are ________ to one another.

• attracted

• repelled

• unrelated

• indifferent

According to the Particle Model of Matter, particles are always ________.

• moving

• stationary

• disappearing

• growing