Topic 1: Matter, Properties of Water, Acids & Bases

Elements have how many types of atoms?

• only 1 type

• 2 types

• more than 2 types

• elements are not made of atoms

Compounds have how many types of atoms?

• only 1 type

• 2 types

• more than 2 types

• elements are not made of atoms

Tags

NGSS.MS-PS1-1

Mixtures are different from compounds because....

• mixtures are chemically bonded together

• mixtures are not chemically bonded together

Mixtures that are not uniform and can be easily separated are classified as...

• homogeneous mixture

• heterogeneous mixture

• compounds

what does this model represent?

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1

Which substance/substances are molecules?

• Helium

• Oxygen

• Water

• Oxygen and Water

Tags

NGSS.MS-PS1-1

Which substance/substances are elements?

• Helium and Oxygen

• Oxygen

• Helium

• Oxygen and Water

Tags

NGSS.MS-PS1-1

If a student is trying to draw a model of the alloy brass, which is a homogeneous mixture of copper and zinc, what model is correct?

• left

• right

Tags

NGSS.MS-PS1-1

True/False: Elements are pure substances that cannot be further broken down.

• true

• false

true/false: compounds are made of two or more elements that are not chemically bonded.

• true

• false