Unit 6 HW Check

What is the most likely ground state electron configuration of Mn²⁺ ion?

• [Ar] 3d³

• [Ar] 3d⁵

• [Ar] 4d³

• [Ar] 4d⁵

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following has a ground state electron configuration with 2 unpaired electrons?

• Mg

• Ge

• P

• N

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NGSS.HS-PS1-1

Identify the element whose 3+ ion has a ground state configuration of [Ar] 3d⁸

• Co

• Ni

• Cu

• Fe

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following are listed in the correct decreasing order of atomic/ionic radius?

• S^2-, Cl^-, K⁺

• Cl^-, S^2-, K⁺

• K⁺, S^2-, Cl^-

• S^2-, K⁺, Cl^-

Which of the following has the largest 1st ionization energy?

• K

• Ca

• Kr

• Br

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is a true comparison of radii between ions and atoms?

• S > S^2-

• Ca > Ca²⁺

• O^2- < O

• Mg²⁺ > Mg

Which of the following has the largest increase between the 1st and 2nd ionization energy?

• K

• Ca

• Br

• Mg

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following best describes ionization energy?

• The energy required to remove an electron and the value is always negative.

• The energy required to add an electron and the value is always negative.

• The energy required to remove an electron and the value is always positive.

• The energy required to add an electron and the value is always negative.

The equation shown below represents which of the following?

M³⁺ + energy → M⁴⁺ + e^-

• a 2nd ionization energy process.

• a 3rd ionization energy process.

• a 1st ionization energy process.

• a 4th ionization energy process.

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NGSS.HS-PS1-2

NGSS.HS-PS1-4

One exception to the trend in ionization energy across a period involves beryllium and boron. Which of the following best explains why beryllium has a higher ionization energy than boron.

HINT: Draw Orbital Notation for beryllium compared to boron.

• Beryllium has a filled 2s orbital and an empty 2p orbital

• Beryllium has a higher effective nuclear charge.

• Beryllium has fewer electron shielding effects.

• Beryllium has a smaller atomic radius.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2