NGSS.MS-PS1-1

(8.5D) In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

• H₃PO₄
• H₂SO₄
• HClO₃
• H₂O

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NGSS.MS-PS1-1

When two or more elements chemically combine

• element
• compound
• mixture
• solution

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NGSS.MS-PS1-1

What part of the atom is the arrow pointing to?

• nucleus
• proton
• electron shell
• electron

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NGSS.MS-PS1-1

The atomic number will always be the same as

• Mass number and number of protons

• Number of neutrons and protons

• number of electrons and protons

• Number of electrons and neutrons

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NGSS.MS-PS1-1

Which statement accurately describes atoms of Oxygen?

• Oxygen atoms have 20 protons

• Oxygen atoms have 8 valence electrons

• Oxygen atoms have 16 neutrons

• Oxygen atoms have 8 electrons

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NGSS.MS-PS1-1

A chemical formula is provided. How many atoms of hydrogen (H) are found in this substance?

(NH₄)₂CO₃

• 2

• 4

• 6

• 8

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NGSS.MS-PS1-1

Which of the particles in the chart is a neutron?

• Particle A

• Particle B

• Particle C

• Particle A and B

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NGSS.MS-PS1-1

What is the correct chemical formula for water?

• H2O

• HO2

• H₂O

• H²O

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NGSS.MS-PS1-1

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

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NGSS.MS-PS1-1

Air is made up of atoms and molecules.

• True

• False

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NGSS.MS-PS1-1