NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

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NGSS.MS-PS1-1

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

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NGSS.MS-PS1-1

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

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NGSS.MS-PS1-1

What is a water molecule composed of?

• 1 Hydrogen atom and 2 Oxygen atoms
• 2 Hydrogen atoms and 1 Oxygen atom
• 3 Oxygen atoms
• 2 Helium atoms and 1 Oxygen atom

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NGSS.MS-PS1-1

Element or compound?
H₂O

• Element
• Compound

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NGSS.MS-PS1-1

Solid carbon dioxide, more commonly known as dry ice, has the chemical formula _______.

• CO

• CO₂

• CO₃

• CH₄

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NGSS.MS-PS1-1

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

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NGSS.MS-PS1-1

What is the atomic mass?

• 58.693

• 28

• 59

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NGSS.MS-PS1-1

How many atoms make up the following molecule?

C₈H₁₀N₄0₂

• 8

• 10

• 1

• 24

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NGSS.MS-PS1-1

This diagram represents a _____.

• Element

• Compound

• Mixture of compound and element

• Mixture of two elements

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NGSS.MS-PS1-1