Periodic Trends Review

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

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How many dots would a Lewis Dot structure of Helium have?

• 1
• 2
• 8
• 0

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How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

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This could be the dot diagram of

• Mg

• Cl

• C

• O

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NGSS.HS-PS1-1

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

• 3

• 4

• 5

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Which of these is correct?

• 
• 
• 

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NGSS.HS-PS1-1

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Magnesium's ion

• Mg⁺
• Mg²⁺
• Mg^-
• Mg^2-

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What is a positive ion called?

• anion

• cation

• isotope

• covalent

What is a negative ion called?

• anion

• cation

• covalent

• isotope

How many electrons would a Nitrogen ion gain/lose? If it has 5 valence electrons.

• lose 5

• gain 5

• lose 3

• gain 3

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NGSS.HS-PS1-1

NGSS.HS-PS1-2