Chemistry Review

Is this balanced?
2HgO → 2Hg + O₂

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The amount of matter an object has.

• Weight

• Mass

• Volume

• Density

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

Which is the best example of a chemical change?

• butter melting

• egg cooking

• paper tearing

• water evaporating

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a homogeneous mixture?

• pizza

• vinegar

• concrete

• woven fabric

An element is identified by

• its number of protons.

• the atomic mass.

• the type of charge.

• its number of isotopes.

The chemical formula for baking soda is NaHCO₃. How many different elements make up baking soda?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

• metals

• nonmetals

• metaloids

• noble gases

If I dissolve sugar in water, what is the solute?

• Water

• Hydrogen

• Sugar

• Carbon

Which best explains why the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction?

• physical change occurred.

• Atoms involved in the reaction lost mass.

• Precipitates were created in the new solution.

• Gases were released to the atmosphere.

Tags

NGSS.MS-PS1-5