Molecules and Compounds

What is an element?

• Two or more atoms joined together.

• One of over 100 types of atoms

• Two or more different elements joined together.

• A particle with no charge found in the nucleus of an atom.

What is a compound?

• Two different elements bonded together.

• Two of the same elements bonded together.

• A mixture of different substances.

• Two substances stuck together with glue.

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NGSS.MS-PS1-1

The tiniest bit of water that still is water is a molecule of water.

• True
• False

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NGSS.MS-PS1-1

An oxygen molecule usually has two oxygen atoms.

• True
• False

Tags

NGSS.MS-PS1-1

Hydrogen is a compound.

• True
• False

Carbon dioxide is a compound.

• True
• False

Tags

NGSS.MS-PS1-1

Salt is an example of a compound.

• True
• False

Tags

NGSS.MS-PS1-1

Two or more atoms joined together make up a _____.

• atom

• molecule

• solution

Tags

NGSS.MS-PS1-1

A substance that is made up of atoms of more than one element is a _______. 

• compound
• rust
• molecule

Tags

NGSS.MS-PS1-1

The smallest unit of a compound is a ___.

• molecule
• atom
• matter

Tags

NGSS.MS-PS1-1