Question 1

The outermost or highest energy electron in element 105 could be characterized by which of the following sets of n, l, ml and ms quantum numbers?

Accepted Answer

A)  7, 3, -3, -  
B)  6, 3, -1, -  
C)  6, 2, 0,  
D)  5, 3, -1, -  
E)  5, 2, 0,

Question 2

Which of the following atoms or ions is the smallest?

Accepted Answer

A)  Na 
B)  Mg 
C)  Na+ 
D)  Mg2+ 
E)  O2-

Question 3

Which atom is represented by a shell model with two electrons in the first shell, and five electrons in the second shell?

Accepted Answer

A)  Be 
B)  C 
C)  N 
D)  K 
E)  P

Question 4

What is the value of x in the following electron configuration for silicon?

1s2 2s2 2p6 3s2 3px

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 5

Which of the following sets of n, l, ml and ms quantum numbers isn't allowed?

Accepted Answer

A)  1,1,0,+  
B)  2,0,0,+  
C)  3,2,1,-  
D)  4,1,-1,+  
E)  5,3,2,-

Question 6

The Pauli exclusion principle states that:

Accepted Answer

A)  No two electrons in an atom can have the same spin. 
B)  No two electrons in an atom can occupy the same orbital. 
C)  Two electrons in the same orbital have identical values of the spin quantum number. 
D)  No two electrons in an atom can have the same set of four quantum numbers. 
E)  Two electrons in an atom can have the same principal quantum number.

Question 7

Which of the following subshells is filled first when electrons are added to the atomic orbitals on a xenon atom?

Accepted Answer

A)  4d 
B)  4f 
C)  5s 
D)  5p 
E)  5d

Question 8

The first ionization energy of the first six elements in the periodic table is given below. 
 
Why is the first ionization energy of B smaller than Be?

Accepted Answer

A)  Because the first IE decreases as we go across a row of the periodic table from left to right. 
B)  Because the nucleus of a B (Z = 5) atom contains fewer protons than the nucleus of a Be (Z = 4) atom. 
C)  Because the outermost electron on B is coming from a 2p, not a 2s orbital. 
D)  Because the atomic number of B is odd, whereas the atomic number of Be is even. 
E)  For the same reason that the first IE of He is larger than that of H.

Question 9

The line structure of the emission spectrum of the hydrogen atom suggests that:

Accepted Answer

A)  The atom is composed of a small positive nucleus and electrons. 
B)  There are many electrons in a hydrogen atom. 
C)  The position and energy of an electron cannot be determined simultaneously. 
D)  The energies of electrons are quantized. 
E)  Each electron has multiple energies.

Question 10

If X-rays have a shorter wavelength than ultraviolet light, which of the following statements is true?

Accepted Answer

A)  X-rays have smaller frequencies than UV light. 
B)  X-rays travel faster than UV light. 
C)  X-rays have more energy than UV light. 
D)  X-rays have larger amplitudes than UV light. 
E)  None of the above statements are true.

Question 11

Give the orbital diagram (using parentheses and arrows to represent orbitals and electrons) of phosphorus.

Accepted Answer

The answer of Give the orbital diagram (using parentheses and...

Question 12

For each pair of atoms, which has the smallest metallic radius?
A) Na, Be
B) K, Mg
C) Cs, Ra

Accepted Answer

The answer of For each pair of atoms, which has...

Question 13

What is the lowest energy electronic configuration of a fluorine atom?

Accepted Answer

A)  1s2 2s2 2p5 
B)  1s2 2s2 2p6 
C)  1s2 2s2 2p7 
D)  1s2 2s2 2p6 3s1 
E)  none of the above

Question 14

What is the orbital designation for the quantum numbers:

N = 4, l = 2, ml = -1?

Accepted Answer

A)  4s 
B)  4p 
C)  4d 
D)  4f 
E)  none of these

Question 15

Predict which atom is most likely to form a positive ion.

Accepted Answer

A)  Ge 
B)  Se 
C)  Br 
D)  F 
E)  S

Question 16

Which is a legitimate set of n, l, ml and ms quantum numbers?

Accepted Answer

A)  0,0,0,  
B)  8,4,-3,-  
C)  3,3,2,+  
D)  2,1,-2,-  
E)  5,3,3,-1

Question 17

Which element is represented by the following PES spectrum?

Accepted Answer

A)  F 
B)  Si 
C)  S 
D)  K 
E)  Ti

Question 18

Which of the following atoms would have four peaks in its PES spectrum?

Accepted Answer

A)  Li 
B)  Mg 
C)  F 
D)  K 
E)  O

Question 19

A possible set of quantum numbers for the highest energy electron in an As3+ ion is:

Accepted Answer

A)  3, 1, -1,  
B)  4, 0, 0, -  
C)  3, 2, 0,  
D)  4, 1, -1,  
E)  5, 0, 0,

Question 20

Which of the following quantum numbers is used to describe the orientation of an orbital in space?

Accepted Answer

A)  n 
B)  / 
C)  ml 
D)  ms 
E)  None of these quantum numbers describe the orientation of an orbital in space.

Exam 3: Structure of the Atom

The outermost or highest energy electron in element 105 could be characterized by which of the following sets of n, l, m_l and m_s quantum numbers?

Which of the following atoms or ions is the smallest?

Which atom is represented by a shell model with two electrons in the first shell, and five electrons in the second shell?

What is the value of x in the following electron configuration for silicon? 1s² 2s² 2p⁶ 3s² 3p^x

Which of the following sets of n, l, m_l and m_s quantum numbers isn't allowed?

The Pauli exclusion principle states that:

Which of the following subshells is filled first when electrons are added to the atomic orbitals on a xenon atom?

The first ionization energy of the first six elements in the periodic table is given below. Why is the first ionization energy of B smaller than Be?

The line structure of the emission spectrum of the hydrogen atom suggests that:

If X-rays have a shorter wavelength than ultraviolet light, which of the following statements is true?

Give the orbital diagram (using parentheses and arrows to represent orbitals and electrons) of phosphorus.

For each pair of atoms, which has the smallest metallic radius? A) Na, Be B) K, Mg C) Cs, Ra

What is the lowest energy electronic configuration of a fluorine atom?

What is the orbital designation for the quantum numbers: N = 4, l = 2, m_l = -1?

Predict which atom is most likely to form a positive ion.

Which is a legitimate set of n, l, m_l and m_s quantum numbers?

Which element is represented by the following PES spectrum?

Which of the following atoms would have four peaks in its PES spectrum?

A possible set of quantum numbers for the highest energy electron in an As³⁺ ion is:

Which of the following quantum numbers is used to describe the orientation of an orbital in space?