Question 1

Draw the ground state energy level diagram for Cu2+.

Accepted Answer

Question 2

What is the major use of sodium carbonate?

Accepted Answer

The answer of What is the major use of sodium...

Question 3

Which of the following is the electron configuration of ground state As atoms?

Accepted Answer

A)   [Ar]4s3d104p4
B)   [Ar]3s23d103p3
C)   [Ar]4s23d104p3
D)   [Ar]4s23d104p4
E)   [Ar]4s24p63d7F) A) and D)
G) C) and E)

Question 4

The 2s orbital calcium is more stable than the 2p orbital even though the 2p orbital has its maximum electron density closer to the nucleus. The reason for this higher stability is

Accepted Answer

A)   calcium's valence orbitals have n = 4.
B)   the 1s orbital screens the 2p orbital more than the 2s orbital.
C)   the 2s orbital has more electron density closer to the nucleus than the 2p orbital.
D)   calcium is an exception to usual trends.
E)   all s orbitals are more stable than p orbitals.F) A) and B)
G) A) and E)

Question 5

How many unpaired electrons are on a sulphur atom?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   6F) B) and E)
G) B) and D)

Question 6

Titanium atoms have electrons in 1s, 2s, 2p, 3s, 3p, 4s, and 3d orbitals. Which of the following has the orbitals listed in the order of decreasing screening ability?

Accepted Answer

A)   1s, 2p, 2s, 3p
B)   2s, 2p, 3d, 3s
C)   2s, 2p, 3s, 3d
D)   1s, 2s, 3p, 3s
E)   3s, 4s, 3p, 3dF) B) and C)
G) All of the above

Question 7

Why do the atoms follow the general trend of becoming smaller as they move across a row?

Accepted Answer

Due to the increase in Z_eff, the ...

Question 8

Which ionic compound will have the smallest lattice energy?

Accepted Answer

A)   KCl
B)   CaCl2
C)   FeCl3
D)   MgCl2
E)   NaClF) All of the above
G) B) and D)

Question 9

Which of the following has the lowest ionization energy?

Accepted Answer

A)   Mg2+
B)   Na+
C)   O2-
D)   Se2-
E)   F-F) None of the above
G) A) and B)

Question 10

Understand why ionic compounds exist and the energetics of their formation.

Accepted Answer

The lattice energy is the ener...

Question 11

Which of the following have 4 valance electrons?

Accepted Answer

A)   Al
B)   Si
C)   P
D)   As
E)   BeF) All of the above
G) A) and B)

Question 12

Salts of Gd3+ are used in magnetic resonance imaging to enhance the quality of the image. How many unpaired electrons are in a Gd3+ ion?

Accepted Answer

A)   0
B)   4
C)   6
D)   7
E)   9F) A) and E)
G) A) and C)

Question 13

The main reason for the anomalous positive electron affinity of nitrogen atoms is

Accepted Answer

A)   electron-electron repulsion in the nitrogen atom.
B)   electron-electron repulsion in the nitrogen ion, N-.
C)   a lower than expected screening in the N atom.
D)   increased negative ionic charge.
E)   electrons are strongly attracted to the nucleus.F) B) and E)
G) D) and E)

Question 14

Why do the s and d block elements readily form cations?

Accepted Answer

They have s electron...

Question 15

Which answer, has the elements arranged in order of most negative to least negative electron affinity?

Accepted Answer

A)   Ge, As, Se
B)   As, Ge, Se
C)   As, Se, Ge
D)   Se, As, Ge
E)   Se, Ge, AsF) A) and E)
G) A) and D)

Question 16

Screening accounts for

Accepted Answer

A)   electron-electron repulsions.
B)   different numbers of neutrons and protons in the nucleus.
C)   differences in deBroglie wavelength.
D)   the nuclear charge of different atoms.
E)   the nuclear charge actually experienced by an electron.F) A) and B)
G) B) and E)

Question 17

Understand the relationships between the structure of the periodic table and electron configurations.

Accepted Answer

The Pauli exclusion principle states tha...

Question 18

Which of the following is expected to have the highest ionization energy for the next electron?

Accepted Answer

A)   F
B)   Sc2+
C)   Ca2+
D)   Al3+
E)   Ga3+F) C) and D)
G) A) and B)

Question 19

Which of the following atoms have three valence electrons?
1)  B
2)  Li
3)  Y
4)  Element 104
5)  Hf

Accepted Answer

A)   1 and 4
B)   1, 2, and 3
C)   1, 3 and 5
D)   3 and 5
E)   1 and 5F) B) and D)
G) A) and D)

Question 20

Which orbital(s)  is/are partially filled in chromium atoms?

Accepted Answer

A)   4s
B)   3p
C)   3s
D)   3d
E)   a and dF) B) and C)
G) B) and E)

Exam 5: Atomic Energies and Periodicity

Which ionic compound will have the smallest lattice energy?

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The 2s orbital calcium is more stable than the 2p orbital even though the 2p orbital has its maximum electron density closer to the nucleus. The reason for this higher stability is

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Screening accounts for

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Which of the following have 4 valance electrons?

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Why do the atoms follow the general trend of becoming smaller as they move across a row?

Correct AnswerverifiedDue to the increase in Zeff, the ...View AnswerShow Answer

The main reason for the anomalous positive electron affinity of nitrogen atoms is

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Titanium atoms have electrons in 1s, 2s, 2p, 3s, 3p, 4s, and 3d orbitals. Which of the following has the orbitals listed in the order of decreasing screening ability?

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Draw the ground state energy level diagram for Cu2+.

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Which of the following has the lowest ionization energy?

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Which answer, has the elements arranged in order of most negative to least negative electron affinity?

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Why do the s and d block elements readily form cations?

Correct AnswerverifiedThey have s electron...View AnswerShow Answer

Understand why ionic compounds exist and the energetics of their formation.

Correct AnswerverifiedThe lattice energy is the ener...View AnswerShow Answer

Which of the following is the electron configuration of ground state As atoms?

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Which of the following atoms have three valence electrons? 1) B 2) Li 3) Y 4) Element 104 5) Hf

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Salts of Gd3+ are used in magnetic resonance imaging to enhance the quality of the image. How many unpaired electrons are in a Gd3+ ion?

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Which orbital(s) is/are partially filled in chromium atoms?

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How many unpaired electrons are on a sulphur atom?

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What is the major use of sodium carbonate?

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Which of the following is expected to have the highest ionization energy for the next electron?

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Understand the relationships between the structure of the periodic table and electron configurations.

Correct AnswerverifiedThe Pauli exclusion principle states tha...View AnswerShow Answer

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Due to the increase in Z_eff, the ...
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Draw the ground state energy level diagram for Cu²⁺.

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They have s electron...
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The lattice energy is the ener...
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Salts of Gd³⁺are used in magnetic resonance imaging to enhance the quality of the image. How many unpaired electrons are in a Gd³⁺ ion?

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The Pauli exclusion principle states tha...
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