Common Assessment Science

_________ are pure substances made of one type of atom.

• Compounds

• Mixtures

• Elements

• Photosynthesis

Which of the following is NOT an element?

• Water

• Nitrogen

• Carbon

• Sulfur

Which of the following is an element?

• Air

• Carbon Dioxide

• Steel

• Oxygen

Every element has a unique name. Elements can also be represented by -

• its chemical weight

• mass

• periodic group

• its chemical symbol

Which correctly lists elements?

• S₂Fe, Al, Sr, O

• C, Fe, Al, Sr

• h₂o, C, Al, S

• c, fe, al, sr

Tags

NGSS.MS-PS1-1

What is the difference between an element and a compound?

• An element is a pure atom and a compound is a combination of atoms.

• An element is a pure substance and a compound is a combination of elements.

• Elements are mixtures and compounds are chemically combined.

• A element can be made of different atoms and substances while compounds are made of only two different elements.

Which substance is an element?

• Water (H₂O)

• Ammonia (NH₃)

• Chlorine (Cl)

• Carbon Dioxide (CO₂)

Which substance is a compound?

• SiH₃

• SiH³

• sih₃

• sih³

Tags

NGSS.MS-PS1-1

Which physical properties are associated with most metals?

• Dull, good insulator, brittle

• Dull, good conductors, malleable

• Shiny, good conductors, malleable

• shiny, good insulator, malleable

Atoms are the basic units of ________.

• elements

• pure substances

• the atmosphere

• matter

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5