NGSS.MS-PS1-1

Molecule

• A group of atoms bonded together
• Basic unit of a chemical element
• Coefficient
• Subscript

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NGSS.MS-PS1-1

If the number of protons equal the number of _____, the atom will have no charge

• protons
• neutrons
• electrons
• nucleus

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NGSS.MS-PS1-1

How many phosphorous atoms are in the formula for Sr₃(PO₄)₂?

• 2
• 3
• 4
• 8

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NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds

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NGSS.MS-PS1-1

What element is this model showing?

• Lithium
• Boron
• Carbon
• Neon

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NGSS.MS-PS1-1

What is the total number of atoms present in 5Na₃PO₄

• 5
• 40
• 55
• 8

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NGSS.MS-PS1-1

Paula works at a paint company and is developing new ingredients to make paint safer to use. She mixed two colorless substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Paula found two yellow substances in the sealed container. (Nothing had escaped.) Which of the diagrams to the left shows the repeating groups of atoms that make up the ending substances?

• 
• 
• 
• 

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NGSS.MS-PS1-2

NGSS.MS-PS1-1

In the lab, Maya is using a substance that has a chemical formula and contains two different elements. Maya’s substance is a(n) _______ .

• element

• compound

• heterogeneous mixture

• homogenous mixture/solution

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NGSS.MS-PS1-1

Salt has a chemical formula of NaCl. Salt is a...

• Compound

• Mixture

• Element

• None of the Above

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NGSS.MS-PS1-1

What is the chemical formula for carbon dioxide?

• C6H12O6

• H2O

• O2

• CO2

• ATP

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NGSS.MS-PS1-1