NGSS.MS-PS1-1

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

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How many atoms in all are in a molecule with the formula

H₂SO₄ ?

• 6

• 5

• 7

• 3

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An atom becomes _______ when it gains electrons.

• Positive

• Neutral

• Negative

• Invisible

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Who was Dimitri Ivanovich Mendeleev?

• Periodic table inventor

• Sandwich

• A singer

• An Astronomer

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Which of the following is a molecule of a compound?

• $H_2$

• $Cl_2$

• $H_2O$

• $F_2$

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A water molecule is made up of two hydrogen (H) atoms and one oxygen (O) atom. In a chemical equation, what would be the correct way to represent six water molecules?

• 6H2O

• 6HO2

• 2H6O6

• 12H6O

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How many neutrons are in Nitrogen?

*Click the image to make it larger.

• 14

• 7

• 21

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How many total atoms in the following equation?

3He₂Ag5

• 2

• 21

• 24

• 5

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Carbon Dioxide is a ______ 

• compound 
• element 
• mixtures 
• Battle of Bunker Hill 

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Which particles are contained in the nucleus of an atom?

• neutrons and electrons

• protons and neutons

• protons, neutron, and electrons

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