Molecules and Compounds

Which of the following molecules DOES NOT contain three atoms?

• CO₂

• H₂O

• N₂

• O₃

Tags

NGSS.MS-PS1-1

What is a compound?

• Two or more different elements bonded together.

• Two of the same elements bonded together.

• A mixture of different substances.

• Two substances stuck together with glue.

Tags

NGSS.MS-PS1-1

Compounds are represented by a

• chemical formula

• chemical symbol

• The Periodic Table of Elements

• pure substance

Tags

NGSS.MS-PS1-1

Atoms of the same element that have the same number of protons, but a different number of neutrons are

• compounds

• molecules

• bonds

• isotopes

O, Na, and S are examples of

• chemical equations

• chemical symbols

• chemical formulas

How many Hydrogen atoms are in the compound of sugar (C₁₂H₂₂O₁₁)?

• 12

• 22

• 11

• 45

Tags

NGSS.MS-PS1-1

An example of a chemical compound is

• Ca

• H₂

• CaCO₃

• 2Fe

Tags

NGSS.MS-PS1-1

A chemist decides to chemically bond two iron atoms and three oxygen atoms. What would the chemical formula look like?

• Ir₂Ox₃

• Fe₂O₃

• FeO

• 2Fe3O

Tags

NGSS.MS-PS1-1

Lithium-6 and lithium-7 are examples of

• compounds

• neutrons

• isotopes

• protons

Is H₂ an element or a compound?

• element

• compound

Tags

NGSS.MS-PS1-1