Modified Chemistry - Unit Test

Front

What is density?

Back

Density is the mass of an object divided by its volume. It is a measure of how much matter is packed into a given space.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H₂O, which indicates that each molecule of water contains two hydrogen atoms and one oxygen atom.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition, such as boiling point, color, or density.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is sublimation?

Back

Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.

Front

What is the boiling point of water at sea level?

Back

The boiling point of water at sea level is 100 degrees Celsius (212 degrees Fahrenheit).

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of protons, neutrons, and electrons.

Front

What is the difference between a chemical property and a physical property?

Back

A chemical property describes a substance's ability to undergo a chemical change, while a physical property can be observed without changing the substance's chemical identity.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom and are involved in chemical bonding.