NGSS.HS-PS1-1

This is a correct dot diagram for oxygen (O)

• true
• false

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NGSS.HS-PS1-1

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

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NGSS.HS-PS1-1

This is the correct dot diagram for sodium (Na)

• true
• false

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NGSS.HS-PS1-1

What does 12.011 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

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NGSS.HS-PS1-1

What does the C represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

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NGSS.HS-PS1-1

Which element is a member of the Halogen family?

• B

• I

• S

• K

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NGSS.HS-PS1-1

An atom of nitrogen (N) has _______ open bonding sites or holes to fill?

• 5

• 4

• 3

• 8

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NGSS.HS-PS1-1

Why are ions formed?

• To make our lives difficult

• Because atoms want to be stable with 8 valence electrons

• Because atoms have the same number of protons and electrons

• Because atoms gained neutrons

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NGSS.HS-PS1-1

Looking at the periodic table, when the alkaline earth metals form an ion what charge do they have?

• 1-

• 1+

• 2-

• 2+

• 3-

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NGSS.HS-PS1-1

Looking at the periodic table, when the halogens form an ion what charge do they have?

• 1-

• 1+

• 2-

• 2+

• 3-

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NGSS.HS-PS1-1