Chemistry Midterm

Front

Subatomic particles with a negative charge

Back

Electrons are subatomic particles that carry a negative charge and are found in the electron cloud surrounding the nucleus of an atom.

Front

What happens to the volume of a balloon when it is left outside on a cold winter day?

Back

The volume of the balloon will decrease due to the decrease in temperature, which causes the gas particles to move closer together.

Front

What is NOT true regarding the Kinetic Molecular Theory of gases?

Back

Gas particles are closely packed and their motion is orderly. This statement is false; gas particles are far apart and move randomly.

Front

What does the observation of particles passing through gold foil indicate?

Back

It provides evidence that there is a dense positively charged nucleus at the center of an atom, as proposed by Rutherford's gold foil experiment.

Front

During which phase change do water droplets form on a cold drink glass?

Back

Condensation occurs when water vapor in the air cools and changes into liquid water, releasing energy in the process.

Front

What is the definition of a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is the definition of a neutron?

Back

A neutron is a subatomic particle with no charge (neutral) found in the nucleus of an atom.

Front

What is the relationship between temperature and gas volume?

Back

According to Charles's Law, the volume of a gas is directly proportional to its temperature when pressure is held constant.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into vapor, occurring at any temperature when molecules at the surface gain enough energy.

Front

What is sublimation?

Back

Sublimation is the phase change in which a solid turns directly into a gas without passing through the liquid phase.