Elements, Molecules and Compounds

Front

What is an atom?

Back

The smallest particle that makes up all matter, consisting of protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

Front

What is a molecule?

Back

A group of two or more atoms bonded together, which can be the same or different.

Tags

NGSS.MS-PS1-1

Front

What is a compound?

Back

A substance formed when two or more different types of atoms bond together.

Tags

NGSS.MS-PS1-1

Front

Are all molecules compounds?

Back

No, only those that contain different types of atoms are compounds.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms.

Front

What does H2O represent?

Back

Water, which is a compound made of two hydrogen atoms and one oxygen atom.

Tags

NGSS.MS-PS1-1

Front

How many atoms are in a molecule of O2?

Back

Two oxygen atoms.

Tags

NGSS.MS-PS1-1

Front

What is the term for a substance made of only one type of atom?

Back

Element.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the chemical formula for carbon dioxide?

Back

CO2, which consists of one carbon atom and two oxygen atoms.

Tags

NGSS.MS-PS1-1