Valence Electrons and Ions

When aluminum forms an ion, its charge is

• +2

• +3

• -2

• -3

The electron configuration for F is 1s2 2s2 2p5. Which orbital diagram represents the most stable ION of Fluorine?

• 
• 
• 
• 

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The electron configuration for oxygen is 1s2 2s2 2p4. What electron configuration matches an oxygen ion?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

• 1s²2s²2p⁴

• 1s²2s²2p⁶

• 1s²2s²2p⁶3s²3p⁶4s²3d¹

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Which electron configuration belongs to a Chloride (Cl^-) ion?

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁷

• 1s² 2s² 2p⁶ 3p⁷

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NGSS.HS-PS1-1

The electron configuration for Al is 1s2 2s2 2p6 3s2 3p1. An Al ion would have which electron configuration?

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p¹

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶

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What must happen to a magnesium atom for it to have an electron arrangement similar to that of a noble gas?

• nothing

• lose 2 protons

• gain 6 electrons

• lose 2 electrons

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Which of these ions have the correct charge when trying to follow the octet rule?

• Na ¹⁺

• Ca ³⁺

• Mg ^2-

• Ne ⁸⁺

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Metals tend to____________ electrons to follow the octet rule and become ________

• gain, cations

• lose, cations

• gain, anions

• lose, anions

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NGSS.HS-PS1-1

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Nonmetals tend to____________ electrons to follow the octet rule and become ________

• gain, cations

• lose, cations

• gain, anions

• lose, anions

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NGSS.HS-PS1-1

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My electron cloud has 4 energy levels and I form a 2+ ion. What element am I?

• magnesium

• calcium

• sulfur

• selenium

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