Valence Electrons and Octet Rule

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 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

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NGSS.HS-PS1-1

How many valence electrons are found in atoms of Iodine?

• 4
• 7
• 9
• 1

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NGSS.HS-PS1-1

How many valence electrons are found in atoms of group 14?

• 4
• 3
• 14
• 16

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NGSS.HS-PS1-1

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

NGSS.HS-PS1-2

The elements on the Periodic Table are arranged in order of increasing...

• mass number

• atomic number

• number of isotopes

• number of valence electrons

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

NGSS.HS-PS1-2

What atom matches this electron configuration?
1s² 2s² 2p⁶ 3s²

• Neon
• Magnesium
• Aluminum
• Potassium

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

Tags

NGSS.HS-PS1-1