Matter and the Atom Pre- Test

Front

What is the structure of an atom?

Back

An atom consists of a nucleus containing protons and neutrons, surrounded by an electron cloud where electrons are found.

Front

Where are neutrons located in an atom?

Back

Neutrons are located in the nucleus of an atom.

Front

What describes the electron cloud model of an atom?

Back

In the electron cloud model, electrons are found in a cloud around the nucleus, rather than in fixed paths.

Front

What are the positively charged particles in an atom called?

Back

Protons are the positively charged particles in an atom.

Front

What happens to particles in a metal rod when it is heated?

Back

The particles in the rod move further apart when heated.

Front

What are the properties of gases?

Back

Gases do not have a definite shape or volume; they take the shape of their container.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the difference between solids, liquids, and gases in terms of particle arrangement?

Back

In solids, particles are closely packed; in liquids, they are close but can move past each other; in gases, particles are far apart and move freely.

Front

What happens to the state of matter when heat is added?

Back

Adding heat can change the state of matter, such as solid to liquid (melting) or liquid to gas (evaporation).