Valence Electrons

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

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NGSS.HS-PS1-1

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Which elements have the most similar chemical properties?

• boron and carbon

• oxygen and sulfur

• aluminum and bromine

• argon and silicon

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NGSS.HS-PS1-1

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All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

• 1

• 2

• 8

• 18

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NGSS.HS-PS1-1

Valence electrons are: 

• Electrons farthest away from the nucleus
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom
• Electrons in the second shell

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

• The total number of neutrons in the unknown element

• The total number of particles in the nucleus of the unknown element

• The number of protons in the nucleus of the unknown element

• The number of valence electrons in the unknown element

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NGSS.HS-PS1-1

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How many valence electrons are in an atom of Se?

• 2
• 8
• 6
• 5

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NGSS.HS-PS1-1

How many valence electrons are in an atom of Ba?

• 2
• 8
• 4
• 1

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NGSS.HS-PS1-1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

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NGSS.HS-PS1-1

How many valence electrons are in an atom of K?

• 3
• 8
• 4
• 1

Tags

NGSS.HS-PS1-1

How many valence electrons are in an atom of Sn?

• 3
• 8
• 4
• 1

Tags

NGSS.HS-PS1-1