NGSS.MS-PS1-1

How many electrons should Oxygen have around its Lewis dot model?

• 5
• 6
• 7
• 8

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NGSS.MS-PS1-1

CaCO₃ represents a chemical

• Symbol
• Formula
• Subscript
• Reaction

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NGSS.MS-PS1-1

What is this?

• Compound
• Mixture of compounds and elements
• Mixture of compounds
• Mixture of elements

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NGSS.MS-PS1-1

True or False: The majority of an atom is made up of empty space

• True
• False

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NGSS.MS-PS1-1

What can be generalized about covalent bonds?

• Electrons will be exchanged.
• Electrons will be transferred.
• Electrons will be given and taken.
• Electrons will be shared.

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NGSS.MS-PS1-1

What is the mass of an atom if it has 11 protons, 12 neutrons, and 11 electrons?

• 22
• 11
• 34
• 23

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NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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NGSS.MS-PS1-1

How many valence electrons?

• 2

• 3

• 4

• 5

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NGSS.MS-PS1-1

Which of the following best describes an atom?

• protons and electrons grouped together in a random pattern

• a core of protons and neutrons surrounded by electrons

• protons and electrons grouped together in an alternating pattern

• a core of electrons and neutrons surrounded by protons

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NGSS.MS-PS1-1

the basic structural unit of matter

• atom

• matter

• element

• nucleus

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NGSS.MS-PS1-1