Elements Molecules Compounds

A(n) ____________ between atoms determine whether they will bond to form a molecule.

• attraction

• compound

• repulsion

• bridge

Which of these is only a molecule and not a compound?

• a

• b

• c

• d

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NGSS.MS-PS1-1

What is krypton?

• element

• compound

• mixture

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What is gold?

• element

• compound

• mixture

This picture represents which of the following?

• molecular element

• molecular compound

• mixture

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This picture represents which of the following?

• molecular element

• molecular compound

• element

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Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?

• Picture A

• Picture B

• Picture C

• Picture D

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Which of the following represents an element?

• H₂O

• H₂

• NaCl

• CaCO₃

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A molecule is

• two or more atoms bonded together

• one type of atom

• smaller than an atom 

• an element

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How many Oxygen atoms are in H₂O?

• 1

• 2

• 0

• 4

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NGSS.MS-PS1-1