6.2.1 Atoms and Molecules

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

How many atoms are in a water molecule?

Back

A water molecule (H2O) contains 3 atoms: 2 hydrogen atoms and 1 oxygen atom.

Front

What happens to water molecules when water is heated?

Back

The water molecules gain energy, move apart, and can become vapor, but they remain water molecules.

Front

What is the shape of table salt's repeating structure?

Back

The repeating structure of table salt is in the shape of a cube.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

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 made of two or more atoms bonded together.

Front

What are the two main types of molecules?

Back

The two main types of molecules are organic molecules (containing carbon) and inorganic molecules (not primarily based on carbon).

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the process of molecules separating and becoming part of the air called?

Back

The process is called evaporation.