Exam 2 Practice Questions

Which of the following is/are true?

• The ground-state electron configuration for Ca²⁺ is [Ar]

• The ground-state electron configuration for Se^2- is [Ar]4s²3d¹⁰4p⁶

• The ground state electron configuration for Ga³⁺ is [Ar]4s²3d⁸

• The ground-state electron configuration for Ag⁺ is [Kr]5s¹4d⁹

Tags

NGSS.HS-PS1-1

Which of the following is/are true?

• Ba₂I is barium iodide

• AgBrO₄ is silver perbromate

• CrPO₄ is chromium(III)phosphate

• Na₃SO₄*10H₂O is sodium sulfate decahydrate

Calculate the total number of atoms in 34.1 mg C₄₀H₇₁N₄O₁₀.

• 2.67E19

• 3.95E20

• 4.33E19

• 3.34E21

Which of the following is/are exceptions to the octet rule? Consider the major resonance structure.

• NO₂^-

• SeF₄

• NO

• BeF₂

• CO

Which of the following is/are diamagnetic?

• Pb⁴⁺

• Cd²⁺

• Ti²⁺

• Ge

Tags

NGSS.HS-PS1-1

Which of the following is/are true?

• CH₃OCH₃ should have a higher melting point than CH₃CH₂OH

• For particles with similar masses, as intermolecular forces become stronger, boiling point, melting point, surface tension, and viscosity all generally increase

• Carbon tetrachloride wold be a better solvent for water than CH₂F₂

• CF₄ should have a lower boiling point than CBr₄

Which of the following is/are true?

• The effective nuclear charge of Ca is smaller than the effective nuclear charge of Cl

• A neutral Ca atom is larger than a neutral Cl atom

• Cl^- is smaller than a neutral Cl atom

• Cl^- is smaller than Ca²⁺

Tags

NGSS.HS-PS1-1

A compound is 36.2% nitrogen by mass. If it has a density of 0.737 g/mL, how many atoms of nitrogen are in 4.05 L of the compound?

• 6.73E24

• 4.64E25

• 4.35E16

• 5.44E22

Which of the following is/are true?

• The second ionization energy is the energy required to remove 2 electrons from a neutral gaseous atom.

• The first ionization energy of K is larger than the first ionization energy of Ca.

• The second ionization energy of K is larger than the second ionization energy of Ca.

• The first ionization energy of K is smaller than the first ionization energy of Li.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is/are true?

• Br has a more exothermic electron affinity than K.

• Kr has a more exothermic electron affinity than Br.

• K has a more exothermic electron affinity than Li.

• Ba has more metallic character than Ni.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2