Question 1

An atom is described as having the electron configuration, [Ar] 4s2 3d5 4f 2. Which element is it?

Accepted Answer

A) one of the chalcogen family 
B) one of the halogen family 
C) one of the alkaline earth family 
D) one of the lanthanide elements 
E) There is no element which fits the description listed above. 
A) one of the chalcogen family 
B) one of the halogen family 
C) one of the alkaline earth family 
D) one of the lanthanide elements 
E) There is no element which fits the description listed above.

Question 2

A diamagnetic element is an element

Accepted Answer

A) that always has an element in an excited state. 
B) that is missing electrons. 
C) that is attracted to a magnet. 
D) that is not attracted to a magnet. 
E) that forms a molecule with two atoms. 
A) that always has an element in an excited state. 
B) that is missing electrons. 
C) that is attracted to a magnet. 
D) that is not attracted to a magnet. 
E) that forms a molecule with two atoms.

Question 3

The notation for the subshell with n = 3 and l = 3 is

Accepted Answer

A) 3d subshell. 
B) 3f subshell. 
C) 3p subshell. 
D) 3s subshell. 
E) There is no subshell fitting this description. 
A) 3d subshell. 
B) 3f subshell. 
C) 3p subshell. 
D) 3s subshell. 
E) There is no subshell fitting this description.

Question 4

Which placement of electrons is never encountered in the ground state configuration of an atom?

Accepted Answer

A) 3d4 with 4 unpaired electrons 
B) 3d5 with 5 unpaired electrons 
C) 3d6 with 6 unpaired electrons 
D) 3d3 with 3 unpaired electrons 
E) 3d2 with 2 unpaired electrons 
A) 3d4 with 4 unpaired electrons 
B) 3d5 with 5 unpaired electrons 
C) 3d6 with 6 unpaired electrons 
D) 3d3 with 3 unpaired electrons 
E) 3d2 with 2 unpaired electrons

Question 5

Which of the following choices is the correct electron configuration for a sulfur atom?

Accepted Answer

The answer of Which of the following choices is the...

Question 6

What is the maximum number of electrons that can fill all the orbitals of a p subshell?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 6 
E) 10 
A) 2 
B) 3 
C) 4 
D) 6 
E) 10

Question 7

Which configuration represents a situation that cannot exist for a ground state or for an excited state (because it violates the Pauli principle)?

Accepted Answer

A) [Ar] 4s2 3d10 4p5 
B) [Xe] 5s2 4d10 5p4 
C) [Rn] 7s2 5f 8  
D) [Kr] 5s1 4d6 
E) [Ne] 6s1 
A) [Ar] 4s2 3d10 4p5 
B) [Xe] 5s2 4d10 5p4 
C) [Rn] 7s2 5f 8  
D) [Kr] 5s1 4d6 
E) [Ne] 6s1

Question 8

Which atom has the electron configuration of [Ar]4s23d104p3?

Accepted Answer

A) P 
B) As 
C) Sb 
D) Bi 
E) N 
A) P 
B) As 
C) Sb 
D) Bi 
E) N

Question 9

A sulfur atom has how many valence electrons?

Accepted Answer

A) 16 
B) 14 
C) 8 
D) 6 
E) 4 
A) 16 
B) 14 
C) 8 
D) 6 
E) 4

Question 10

Calculate the frequency of visible light having a wavelength of 25.3 cm.

Accepted Answer

A) 8.44 × 10-8 s-1 
B) 1.19 × 109 s-1 
C) 1.19 × 107 s-1 
D) 7.58 × 109 s-1 
E) 7.58 × 107 s-1 
A) 8.44 × 10-8 s-1 
B) 1.19 × 109 s-1 
C) 1.19 × 107 s-1 
D) 7.58 × 109 s-1 
E) 7.58 × 107 s-1

Question 11

For which process is the largest amount of energy required?

Accepted Answer

A) Be+(g)$\rarr$  Be2+(g)+ e- 
B) Be2+(g)$\rarr$  Be3+(g)+ e- 
C) B2+(g)$\rarr$  B3+(g)+ e- 
D) C(g)$\rarr$  C+(g)+ e- 
E) C2+(g)$\rarr$  C3+(g)+ e- 
A) Be+(g)$\rarr$  Be2+(g)+ e- 
B) Be2+(g)$\rarr$  Be3+(g)+ e- 
C) B2+(g)$\rarr$  B3+(g)+ e- 
D) C(g)$\rarr$  C+(g)+ e- 
E) C2+(g)$\rarr$  C3+(g)+ e-

Question 12

What is the wavelength of radiation which has an energy of 3.371 × 10-19 joules per photon?

Accepted Answer

A) 655.9 nm 
B) 152.5 nm 
C) 170.0 nm 
D) 589.3 nm 
E) 745.1 nm 
A) 655.9 nm 
B) 152.5 nm 
C) 170.0 nm 
D) 589.3 nm 
E) 745.1 nm

Question 13

Large steps in ionization energy are observed for most elements due to the fact that half full and full subshells have extra stability, and therefore take more energy to remove an electron than would be predicted by the normal trend.

Accepted Answer

A) True 
 B)False

Question 14

A nitrogen atom has how many valence electrons?

Accepted Answer

A) 16 
B) 12 
C) 5 
D) 6 
E) 4 
A) 16 
B) 12 
C) 5 
D) 6 
E) 4

Question 15

Which radiation has the shortest wavelength?

Accepted Answer

A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) visible light rays 
A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) visible light rays

Question 16

Which atom has the smallest radius?

Accepted Answer

A) Ar 
B) Ca 
C) K 
D) Mg 
E) Na 
A) Ar 
B) Ca 
C) K 
D) Mg 
E) Na

Question 17

Which radiation has the highest frequency?

Accepted Answer

A) blue visible light 
B) radio waves 
C) infrared radiation 
D) microwave radiation 
E) red visible light 
A) blue visible light 
B) radio waves 
C) infrared radiation 
D) microwave radiation 
E) red visible light

Question 18

For a given value of n, the angular momentum quantum number, l, ranges from l = 0 to

Accepted Answer

A) True 
 B)False

Question 19

A possible set of quantum numbers for an electron in the partially filled subshell in a germanium atom in its ground state configuration would be

Accepted Answer

The answer of A possible set of quantum numbers for...

Question 20

What is the energy, in joules, of one mole of photons of visible light having a wavelength of 6.235 × 10-6 m (c = 2.998 × 108 m/s)?

Accepted Answer

Exam 8: The Quantum Mechanical Atom

An atom is described as having the electron configuration, [Ar] 4s2 3d5 4f 2. Which element is it?

A diamagnetic element is an element

The notation for the subshell with n = 3 and l = 3 is

Which placement of electrons is never encountered in the ground state configuration of an atom?

Which of the following choices is the correct electron configuration for a sulfur atom?

What is the maximum number of electrons that can fill all the orbitals of a p subshell?

Which configuration represents a situation that cannot exist for a ground state or for an excited state (because it violates the Pauli principle)?

Which atom has the electron configuration of [Ar]4s23d104p3?

A sulfur atom has how many valence electrons?

Calculate the frequency of visible light having a wavelength of 25.3 cm.

For which process is the largest amount of energy required?

What is the wavelength of radiation which has an energy of 3.371 × 10-19 joules per photon?

Large steps in ionization energy are observed for most elements due to the fact that half full and full subshells have extra stability, and therefore take more energy to remove an electron than would be predicted by the normal trend.

A nitrogen atom has how many valence electrons?

Which radiation has the shortest wavelength?

Which atom has the smallest radius?

Which radiation has the highest frequency?

For a given value of n, the angular momentum quantum number, l, ranges from l = 0 to

A possible set of quantum numbers for an electron in the partially filled subshell in a germanium atom in its ground state configuration would be

What is the energy, in joules, of one mole of photons of visible light having a wavelength of 6.235 × 10-6 m (c = 2.998 × 108 m/s)?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

An atom is described as having the electron configuration, [Ar] 4s² 3d⁵ 4f ². Which element is it?

Which atom has the electron configuration of [Ar]4s²3d¹⁰4p³?

What is the wavelength of radiation which has an energy of 3.371 × 10^-19 joules per photon?

What is the energy, in joules, of one mole of photons of visible light having a wavelength of 6.235 × 10^-6 m (c = 2.998 × 10⁸ m/s)?