NGSS.MS-PS1-1

What is the sun made from?

• Heat
• Hydrogen and Helium gas
• Nitrogen gas
• Fire and heat

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NGSS.MS-PS1-1

What are the names of the particles in the nucleus?

• protons and neutrons
• protons and electrons
• photons and neutrons
• nucleons and protons

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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

Two or more atoms chemically bonded together are called a

• atom
• element
• molecule
• mixture

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NGSS.MS-PS1-1

How many hydrogen atoms are there in a water molecule? 

• 0
• 1
• 2
• 3

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NGSS.MS-PS1-1

What is the picture displayed?

• atom
• element
• molecule
• compound

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NGSS.MS-PS1-1

The atoms of a certain element each contain 9 protons and 7 valence electrons. Which statement correctly identifies this element and describes the chemical reactivity?

• The element is oxygen, and is highly reactive.

• The element is fluorine, and is highly reactive.

• The element is oxygen, and is not very reactive.

• The element is fluorine, and is not very reactive.

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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 are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

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NGSS.MS-PS1-1

How many total elements are in the chemical formula of CHN3Au?

• 3

• 4

• 6

• 5

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NGSS.MS-PS1-1