Unit 2 Periodic Table Review

An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table shown above would the element most likely be found?

• 1

• 2

• 3

• 4

Which experimental results show a mixture?

• Ruth applies heat to a liquid and large green crystals are left in the beaker after all the liquid has boiled away.

• Aria applies heat to an unknown substance. A gas is produced and an entirely new substance with new properties is left in the beaker.

• Simon applies heat to a solid and the solid melts into a puddle.

• Marcus applies heat to a liquid. The liquid bubbles and turns into a gas.

A mystery element is very brittle, is not shiny, and does not conduct electricity. It is also more likely to share electrons equally when forming a compound. Based on the evidence, which group does the mystery element belong?

• 1

• 2

• 3

• 4

Which option contains only compounds?

• H₂O, H₂O₂ , H₃O, CO₂

• Au, Ni, Cu, Fe

• NH₃ , KNO ₃ , Hg, Ne

• Na, NaCl, Pb, C_6, H₁₂O

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NGSS.MS-PS1-1

Examine the models. Choose two models that represent a pure substance.

• A and B

• B and C

• A and C

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Examine the models. Which of the models best represents a mixture?

• A

• B

• C

A trumpet is a musical instrument made of brass. Brass is made of both copper and zinc metals. Which statement is the BEST description of brass.

• Brass is a mixture.

• Brass is a molecule.

• Brass is a compound.

• noble gases.

Which of the samples shown represents an element?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

23. Baking soda is used to make cookies. The chemical formula for baking soda is NaHCO 3 . Which term describes baking soda?

• monoatomic element

• mixture

• solution

• compound

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NGSS.MS-PS1-1

Which of the following is a molecule, but is NOT a compound?

A. carbon dioxide (CO 2) B. ozone (O 3)

C. water (H 2O) D. sodium chloride (NaCl)

• carbon dioxide (CO₂)

• ozone (O₃)

• water (H₂O)

• sodium chloride (NaCl)

Tags

NGSS.MS-PS1-1