S6E1 C

The chemical symbol for nitrogen is —

• Na

• Ni

• Ne

• N

Which of the following correctly represents an element?

• Water – H2O

• Copper – Cu

• Carbon monoxide – CO

• Salt – NaCl

Which of the following substances represents an element?

• 2, 3, 5, and 6

• 2, 5, and 6

• 1 and 4

• 1, 3, and 4

Tags

NGSS.MS-PS1-1

Which of the following substances represents a compound?

• 2, 3, 5, and 6

• 2 and 6

• 1 and 4

• 1, 2, 3, and 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Compounds are pure substances. What other substances are considered pure substances?

• Chemical reactions

• Elements

• Mixtures

• Solutions

Which of the following substances is an element?

• CO2

• NaS

• Co

• KF

Which of the following is a compound?

• Co

• Fe

• H

• CO

Tags

NGSS.MS-PS1-1

Which model shown above best represents the element neon as a gas?

• Model A

• Model B

• Model C

• Model D

Tags

NGSS.MS-PS1-4

Which of the following is the symbol for chlorine?

• Ch

• C

• Cl

• Ce

Which example provides evidence of a chemical change?

• Wood releases ash and smoke when burned.

• Rock particles separate when soil is being sifted.

• Boiling water bubbles when being heated.

• Sugar is not visible when dissolved in water.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5