Compounds and Chemical Reactions

A molecule with atoms from two or more different elements.

• compound

• chemical change

• formula

Tags

NGSS.MS-PS1-1

Which two elements make up water?

• hydrogen and oxygen

• oxygen and nitrogen

• hydrogen and chlorine

Tags

NGSS.MS-PS1-1

When chlorine and sodium combine, what compound is formed?

• salt

• sugar

• sand

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The small number in a chemical formula that tell us how many atoms of that element are in a molecule is called a

• subatomic number

• subscript

• submarine

The formula for glucose is C₆H₁₂O₆. How many elements does glucose contain?

• 1

• 3

• 24

• 432

Tags

NGSS.MS-PS1-1

The kind of chemical reaction that occurs when molecules combine to form a new substance.

• decomposition reaction

• single replacement

• synthesis reaction

Tags

NGSS.MS-PS1-5

The kind of chemical reaction that breaks down a complex compound into two or more simpler compounds.

• double replacement

• decomposition reaction

• synthesis reaction

Type of chemical reaction in which one element replaces another element.

• single replacement

• double replacement

• decomposition chemical reaction

Type of chemical reaction in which tow elements switch places.

• double replacement chemical reaction

• double trouble chemical reaction

• double stuff chemical reaction

A group of atoms joined together is called a(n)

• molecule

• chemical change

• element

Tags

NGSS.MS-PS1-1