Compounds, Molecules, Atoms

Which of the following is an example of a compound?

• Oxygen-O

• Gold-Au

• Water-H₂O

• Helium-He

Tags

NGSS.MS-PS1-1

What of the following is not an example of a molecule?

• H₂O

• O₂

• CO₂

• Na

Tags

NGSS.MS-PS1-1

Which of the following is an example of an element?

• Salt-NaCl

• Carbon dioxide-CO₂

• Oxygen-O₂

• Water-H₂O

Tags

NGSS.MS-PS1-1

What is a compound?

• A pure substance made up of only one type of atom

• A molecule made of 2 or more different elements

• An element

• A single atom

Tags

NGSS.MS-PS1-1

What is the chemical symbol for the element oxygen?

• Ox

• O

• Om

• On

Which of the following is true of CO₂?

• It is an element with 3 atoms.

• It is a compound with 3 atoms.

• It is an element with 2 atoms.

• It is a compound with 2 atoms.

Tags

NGSS.MS-PS1-1

Which of the following is NOT an element?

• O₃

• O

• SO₃

• Na

Which of the following is true of Na?

• It has 2 elements which are N and a.

• It has 1 element which is Na.

• It has 1 element which is N.

• It is not an element. It is a compound.

Tags

NGSS.MS-PS1-1

The picture represents

• a compound

• an element and a molecule

• a compound an a molecule

Tags

NGSS.MS-PS1-1

Which of the following shows the chemical formula for a compound containing 6 carbon atoms, 4 hydrogen atoms, and 2 chlorine atoms.

• 6C4H2Cl

• C₆H₄Cl₂

• C₆H₄C₂

Tags

NGSS.MS-PS1-1