2.3 Atoms and Molecules

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is a molecule?

Back

A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What happens to gas atoms when they leave a container?

Back

Gas atoms go into the atmosphere.

Front

What gas is commonly released when Alka-Seltzer is added to water?

Back

Carbon dioxide (CO2).

Front

Can atoms turn into different atoms?

Back

False, atoms cannot turn into different atoms.

Front

Can molecules break apart and reform new molecules?

Back

True, molecules can break apart and reform new molecules.

Front

What is the role of carbon dioxide in the Alka-Seltzer experiment?

Back

It is the gas released that causes the BTB to turn yellow.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the significance of the BTB turning yellow in the experiment?

Back

It indicates that carbon dioxide was released, showing a chemical reaction.

Front

What are the components of an atom?

Back

Atoms consist of protons, neutrons, and electrons.