Chemistry Unit Review

All matter is made up of .....

• Compounds

• Atoms

• Molecules

• Air

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Where are the most reactive nonmetals located on the periodic table?

• the uppermost complete row of the table

• the rows at the bottom of the table connecting two sections

• the column at the far left side of the table

• the second column from the right side of the table

How does the concept of conservation of mass apply to chemical reactions?

• The reactants and products have exactly the same atoms.

• The reactants and products have exactly the same molecules.

• The change in the amount of matter is equal to the change in energy.

• The change in the amount of matter is only a small percentage of the total mass.

Tags

NGSS.MS-PS1-5

Which substance is composed of only one type of atom?

• water

• gold

• salt

• sugar

Tags

NGSS.MS-PS1-1

When oxygen combines with hydrogen, which substance is formed?

• water

• vinegar

• hydrochloric acid

• hydrogen dioxide

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Where are the most reactive metals located on the periodic table?

• the uppermost complete row of the table

• the rows at the bottom of the table connecting two section

• the column at the far left side of the table

• the second column from the right side of the table

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

• During a chemical reaction, the total amount of matter stays the same.

• During a chemical reaction, matter is destroyed.

• During a chemical reaction, one or more new substances are formed.

• During a chemical reaction, the total number of atoms increases.

Tags

NGSS.MS-PS1-5

table salt (NaCl)

• compound

• homogenous mixture

• heterogenous mixture

• pure substance

Tags

NGSS.MS-PS1-1

Are made from a combination of 2 or more elements...

• Molecules
• Pure Substances
• Compounds
• Elements

Tags

NGSS.MS-PS1-1

Which is the BEST evidence that a chemical change has occurred?

• change of state

• release of energy

• temperature change

• formation of a new substance

Tags

NGSS.MS-PS1-2