Question 1

Which of the following statements is true?

Accepted Answer

A)  We can determine the exact location of an electron if we know its energy. 
B)  Ni has 2 unpaired electrons in its 3d orbitals. 
C)  An electron in a 2s orbital can have the same n, l, and ml quantum numbers as an electron in a 3s orbital. 
D)  Only three quantum numbers are needed to uniquely describe an electron. 
E)  In the building up of atoms, electrons occupy the 4f orbitals before the 6s orbitals. 
A)  We can determine the exact location of an electron if we know its energy. 
B)  Ni has 2 unpaired electrons in its 3d orbitals. 
C)  An electron in a 2s orbital can have the same n, l, and ml quantum numbers as an electron in a 3s orbital. 
D)  Only three quantum numbers are needed to uniquely describe an electron. 
E)  In the building up of atoms, electrons occupy the 4f orbitals before the 6s orbitals.

Question 2

How many of the following electron configurations for the species in their ground state are correct?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 3

Which of the following electron configurations is correct?

Accepted Answer

A)  Ca: [Ar]4s13d10 
B)  Mo: [Kr]5s24d5 
C)  Br: [Kr]3d104s24p7 
D)  Bi: [Xe]6s24f145d106p3 
E)  Ga: [Kr]3d104s24p1 
A)  Ca: [Ar]4s13d10 
B)  Mo: [Kr]5s24d5 
C)  Br: [Kr]3d104s24p7 
D)  Bi: [Xe]6s24f145d106p3 
E)  Ga: [Kr]3d104s24p1

Question 4

Which of the following frequencies corresponds to light with the longest wavelength?

Accepted Answer

A)  9.12 *1012 s-1 
B)  3.20 * 109 s-1 
C)  8.50 * 1020 s-1 
D)  3.00 *1013 s-1 
E)  4.12 * 105 s-1 
A)  9.12 *1012 s-1 
B)  3.20 * 109 s-1 
C)  8.50 * 1020 s-1 
D)  3.00 *1013 s-1 
E)  4.12 * 105 s-1

Question 5

In which orbital does an electron experience the highest Zeff?

Accepted Answer

A)  P (3p) 
B)  Na (3s) 
C)  Al (3p) 
D)  Mg (3s) 
E)  S (3p) 
A)  P (3p) 
B)  Na (3s) 
C)  Al (3p) 
D)  Mg (3s) 
E)  S (3p)

Question 6

What is the electron configuration for Cr2+?

Accepted Answer

A)  [Ar] 4s13d5 
B)  [Ar] 4s23d4 
C)  [Ar] 4s23d2 
D)  [Ar] 3d4 
E)  none of these 
A)  [Ar] 4s13d5 
B)  [Ar] 4s23d4 
C)  [Ar] 4s23d2 
D)  [Ar] 3d4 
E)  none of these

Question 7

For which element are the d orbitals completely filled in the neutral atom?

Accepted Answer

A)  bromine 
B)  phosphorus 
C)  potassium 
D)  vanadium 
E)  iron 
A)  bromine 
B)  phosphorus 
C)  potassium 
D)  vanadium 
E)  iron

Question 8

Which of the following combinations of quantum numbers is not allowed? (Combinations are listed as follows: n, l, m(l), m(s).)

Accepted Answer

A)    
B)    
C)   
D)   . 
E)    
A)    
B)    
C)   
D)   . 
E)

Question 9

On a planet where the temperature is so high, the ground state of an electron in the hydrogen atom is n = 4. What is the ratio of IE on this planet to that on earth?

Accepted Answer

A)  1:16 
B)  1:4 
C)  4:1 
D)  16:1 
E)  1:1 
A)  1:16 
B)  1:4 
C)  4:1 
D)  16:1 
E)  1:1

Question 10

Which of the following statements is false?

Accepted Answer

A)  In the usual order of filling, the 6s orbital is filled before the 4f orbital. 
B)  An orbital can accommodate at most two electrons. 
C)  The spin quantum number of an electron must be either +1/2 or -1/2. 
D)  A 2p orbital is more penetrating than a 2s; that is, it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital. 
E)  The electron density at a point is proportional to F1F1F1S1F1F1F102 at that point. 
A)  In the usual order of filling, the 6s orbital is filled before the 4f orbital. 
B)  An orbital can accommodate at most two electrons. 
C)  The spin quantum number of an electron must be either +1/2 or -1/2. 
D)  A 2p orbital is more penetrating than a 2s; that is, it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital. 
E)  The electron density at a point is proportional to F1F1F1S1F1F1F102 at that point.

Question 11

Which of the following sets has elements with the most nearly identical atomic radii?

Accepted Answer

A)  Mg, Ca, Sr, Cs 
B)  Be, B, C, N 
C)  Ne, Kr, Ar, Xe 
D)  C, P, Se, Br 
E)  Cr, Fe, Co, Mn 
A)  Mg, Ca, Sr, Cs 
B)  Be, B, C, N 
C)  Ne, Kr, Ar, Xe 
D)  C, P, Se, Br 
E)  Cr, Fe, Co, Mn

Question 12

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state.
-1s22s22p5

Accepted Answer

The element is F wit

Question 13

Which of the following atoms or ions has 3 unpaired electrons?

Accepted Answer

A)  Br- 
B)  Ga 
C)  S 
D)  Co 
E)  Mg2+ 
A)  Br- 
B)  Ga 
C)  S 
D)  Co 
E)  Mg2+

Question 14

Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 3.31 *10-3 pm. Which element is this?

Accepted Answer

A)  P 
B)  Ca 
C)  He 
D)  F 
E)  Be 
A)  P 
B)  Ca 
C)  He 
D)  F 
E)  Be

Question 15

What is the valence electron configuration of S?

Accepted Answer

A)  3s23p4 
B)  4s24p4 
C)  1s22s22p63s23p4 
D)  1s22s22p4 
E)  none of these 
A)  3s23p4 
B)  4s24p4 
C)  1s22s22p63s23p4 
D)  1s22s22p4 
E)  none of these

Question 16

Which atom has three 2p electrons in its ground state?

Accepted Answer

A)  Si 
B)  As 
C)  N 
D)  P 
E)  none of these 
A)  Si 
B)  As 
C)  N 
D)  P 
E)  none of these

Question 17

What is the total number of electrons that can be accommodated in the level corresponding to n = 5?

Accepted Answer

A)  32 
B)  2 
C)  50 
D)  8 
E)  18 
A)  32 
B)  2 
C)  50 
D)  8 
E)  18

Question 18

An element with the electron configuration [Xe]4f145d76s2 would belong to which class on the periodic table?

Accepted Answer

A)  transition elements 
B)  alkaline earth elements 
C)  rare earth elements 
D)  halogens 
E)  none of these 
A)  transition elements 
B)  alkaline earth elements 
C)  rare earth elements 
D)  halogens 
E)  none of these

Question 19

Light has a wavelength of 5.8 *102 nm. What is the energy of a photon of this light?

Accepted Answer

A)  2.62 *1018 J 
B)  3.81 * 10-20 J 
C)  1.28 * 10-18 J 
D)  1.14 *10-19 J 
E)  3.42 * 10-19 J 
A)  2.62 *1018 J 
B)  3.81 * 10-20 J 
C)  1.28 * 10-18 J 
D)  1.14 *10-19 J 
E)  3.42 * 10-19 J

Question 20

A photographic film needs a minimum of 80.0 kJ/mol for exposure. The frequencies of visible light are in the range 7.5 * 1014 Hz to 4.3 * 1014 Hz. Is the radiation visible to the human eye?

Accepted Answer

A)  yes 
B)  no 
C)  More information is needed. 
A)  yes 
B)  no 
C)  More information is needed.

Which of the following statements is true?

How many of the following electron configurations for the species in their ground state are correct?

Which of the following electron configurations is correct?

Which of the following frequencies corresponds to light with the longest wavelength?

In which orbital does an electron experience the highest Z_eff?

What is the electron configuration for Cr²⁺?

For which element are the d orbitals completely filled in the neutral atom?

Which of the following combinations of quantum numbers is not allowed? (Combinations are listed as follows: n, l, m₍_l₎, m₍_s).)

On a planet where the temperature is so high, the ground state of an electron in the hydrogen atom is n = 4. What is the ratio of IE on this planet to that on earth?

Which of the following statements is false?

Which of the following sets has elements with the most nearly identical atomic radii?

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -1s²2s²2p⁵

Which of the following atoms or ions has 3 unpaired electrons?

Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 3.31 *10^-³ pm. Which element is this?

What is the valence electron configuration of S?

Which atom has three 2p electrons in its ground state?

What is the total number of electrons that can be accommodated in the level corresponding to n = 5?

An element with the electron configuration [Xe]4f¹⁴5d⁷6s² would belong to which class on the periodic table?

Light has a wavelength of 5.8 *10² nm. What is the energy of a photon of this light?

A photographic film needs a minimum of 80.0 kJ/mol for exposure. The frequencies of visible light are in the range 7.5 * 10¹⁴ Hz to 4.3 * 10¹⁴ Hz. Is the radiation visible to the human eye?

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Exam 12: Quantum Mechanics and Atomic Theory

Which of the following statements is true?

How many of the following electron configurations for the species in their ground state are correct?

Which of the following electron configurations is correct?

Which of the following frequencies corresponds to light with the longest wavelength?

In which orbital does an electron experience the highest Zeff?

What is the electron configuration for Cr2+?

For which element are the d orbitals completely filled in the neutral atom?

Which of the following combinations of quantum numbers is not allowed? (Combinations are listed as follows: n, l, m(l), m(s).)

On a planet where the temperature is so high, the ground state of an electron in the hydrogen atom is n = 4. What is the ratio of IE on this planet to that on earth?

Which of the following statements is false?

Which of the following sets has elements with the most nearly identical atomic radii?

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -1s22s22p5

Which of the following atoms or ions has 3 unpaired electrons?

Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 3.31 *10-3 pm. Which element is this?

What is the valence electron configuration of S?

Which atom has three 2p electrons in its ground state?

What is the total number of electrons that can be accommodated in the level corresponding to n = 5?

An element with the electron configuration [Xe]4f145d76s2 would belong to which class on the periodic table?

Light has a wavelength of 5.8 *102 nm. What is the energy of a photon of this light?

A photographic film needs a minimum of 80.0 kJ/mol for exposure. The frequencies of visible light are in the range 7.5 * 1014 Hz to 4.3 * 1014 Hz. Is the radiation visible to the human eye?

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

In which orbital does an electron experience the highest Z_eff?

What is the electron configuration for Cr²⁺?

Which of the following combinations of quantum numbers is not allowed? (Combinations are listed as follows: n, l, m₍_l₎, m₍_s).)

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -1s²2s²2p⁵

Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 3.31 *10^-³ pm. Which element is this?

An element with the electron configuration [Xe]4f¹⁴5d⁷6s² would belong to which class on the periodic table?

Light has a wavelength of 5.8 *10² nm. What is the energy of a photon of this light?

A photographic film needs a minimum of 80.0 kJ/mol for exposure. The frequencies of visible light are in the range 7.5 * 10¹⁴ Hz to 4.3 * 10¹⁴ Hz. Is the radiation visible to the human eye?