NGSS.MS-PS1-1

How many Chlorine are in MgCl₂?

• 2
• 1
• 3

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NGSS.MS-PS1-1

When 2 or more elements combine a/an __________ is formed.

• atom
• compound

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NGSS.MS-PS1-1

How many more valence electrons does Oxygen need to be stable?

• 6
• 2
• 4
• It's already stable with 8

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NGSS.MS-PS1-1

How many protons does fluorine have?

• 19

• 1

• 9

• 10

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NGSS.MS-PS1-1

What is the atomic number of this atom?

• 2

• 4

• 6

• 8

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NGSS.MS-PS1-1

What is CO₂?

• Carbon Monoxide

• Carbon Trioxide

• Carbon Dioxide

• Oxygen

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NGSS.MS-PS1-1

What does the nucleus of an atom contain?

• Electrons and neutrons

• Protons and neutrons

• Electrons and protons

• DNA

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NGSS.MS-PS1-1

What is something that is made of all the same atoms or groups of atoms?

• Substance

• Molecule

• Reactant

• Property

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NGSS.MS-PS1-1

To find the number of neutrons, you subtract the atomic ________ from the atomic ________.

• mass; number
• number; mass
• electrons; protons
• neutrons; electrons

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NGSS.MS-PS1-1

What purpose do molecular models, drawings, and diagrams serve? (check all that apply)

• They allow us visual representations for things we can't normally see.

• They make concepts more difficult to understand.

• They make concepts easier to understand.

• They serve no purpose.

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NGSS.MS-PS1-1