NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

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NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

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NGSS.MS-PS1-1

Most of the mass in an atom is concentrated in the _____.

• Electrons
• Nucleus
• Protons
• Empty space

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NGSS.MS-PS1-1

(8.5A) An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?

• +25
• +30
• -25
• -30

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NGSS.MS-PS1-1

Where is the neutron located?

• In the loose nucleus with the electron
• In the dense nucleus with the protons
• In the electron cloud
• The nucleus floats on orbitals

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NGSS.MS-PS1-1

What is the mass of an atom with seven protons, seven neutrons, and eight electrons?

• 7

• 8

• 14

• 22

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NGSS.MS-PS1-1

What is sugar (C₁₂H₂₂O₁₁)?

• element
• compound
• mixture

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NGSS.MS-PS1-1

IF A SUBSTANCE CONTAIN TWO OR MORE KINDS OF MOLECULES, IT IS CALLED

• ELEMENT

• COMPOUND

• MIXTURE

• NONE OF THE ABOVE

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NGSS.MS-PS1-1

Which model is demonstrating what molecules in a solid look like.

• 
• 
• 

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NGSS.MS-PS1-1

The compound potassium sulfate, K₂SO_4, is composed of

• 2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen.

• 2 atoms of potassium, 4 atoms of sulfur, and 4 atoms of oxygen.

• two molecules of potassium and one molecule of sulfate.

• one molecule of potassium and two molecules of sulfate.

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NGSS.MS-PS1-1