Question 1

Choose the orbital diagram that represents the ground state of N.
A)

B)

C)

D)

E)

Accepted Answer

A

Question 2

Give the ground state electron configuration for Cd. A)[Kr] 5s²5d¹⁰ B)[Kr] 5s²4d¹⁰5p² C)[Kr] 4d¹⁰ D)[Kr] 5s²4d⁸ E)[Kr] 5s²4d¹⁰

Accepted Answer

Cd has 48 electrons. The electron configuration of Cd is [Kr] 4d10 5s2. This can be rewritten as [Kr] 5s2 4d10. The ground state electron configuration is obtained by filling the orbitals in order of increasing energy, so the 4d orbitals are filled before the 5p orbitals. Therefore, the correct ground state electron configuration is [Kr] 5s1 4d10. Choice E represents this configuration.

Question 3

Give the ground state electron configuration for Pb. A)[Xe] 6s²6p² B)[Xe] 6s²5d¹⁰6p² C)[Xe] 6s²5f¹⁴6d¹⁰6p² D)[Xe] 6s²4f¹⁴5d¹⁰6p² E)[Xe] 6s²5f¹⁴5d¹⁰6p²

Accepted Answer

Lead (Pb) has the electron configuration [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p², which corresponds to option D.

Question 4

Choose the valence orbital diagram that represents the Si.
A)
B)
C)
D)
E)

Accepted Answer

The answer of Choose the valence orbital diagram that represents...

Question 5

Choose the valence orbital diagram that represents the ground state of Zn.
A)
B)
C)
D)
E)

Accepted Answer

The answer of Choose the valence orbital diagram that represents...

Question 6

How many unpaired electrons are present in the ground state Ge atom?
A)0
B)3
C)1
D)2
E)4

Accepted Answer

The answer of How many unpaired electrons are present in...

Question 7

Write out the orbital diagram that represents the ground state of As.How many unpaired electrons are there?
A)0
B)4
C)3
D)2
E)1

Accepted Answer

Arsenic (As) has an atomic number of 33. Its electron configuration is [Ar] 3d^10 4s^2 4p^3. The 4p subshell has three electrons, each occupying a separate orbital, resulting in three unpaired electrons.

Question 8

Give the ground state electron configuration for Sr. A)[Kr] 5s²4d² B)[Kr] 5s²4d¹⁰5p² C)[Kr] 5s² D)[Kr] 5s²5d¹⁰5p² E)[Kr] 5s²4d¹⁰

Accepted Answer

The ground state electron configuration for Sr is [Kr] 5s2S1. Choice C correctly represents this configuration, without any unnecessary or incorrect subshells.

Question 9

How many unpaired electrons are present in the ground state P atom?
A)0
B)3
C)1
D)2
E)4

Accepted Answer

Phosphorus (P) has an atomic number of 15, which means it has 15 electrons. In its ground state, the electron configuration is 1s² 2s² 2p⁶ 3s² 3p³. The 3p subshell has three electrons, each occupying a separate p orbital, resulting in three unpaired electrons.

Question 10

Give the ground state electron configuration for I. A)[Kr] 5s²4d¹⁰5p⁶ B)[Kr] 5s²4d¹⁰5p⁵ C)[Kr] 4d¹⁰5p⁶ D)[Kr] 5s²5p⁶ E)[Kr] 5s²5d¹⁰5p⁶

Accepted Answer

The ground state electron configuration for iodine (I) is [Kr] 5s² 4d¹⁰ 5p⁵, as it has 53 electrons.

Question 11

Which of the following statements is true?
A)An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.
B)An orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.
C)It is possible for two electrons in the same atom to have identical values for all four quantum numbers.
D)Two electrons in the same orbital can have the same spin.
E)None of the above are true.

Accepted Answer

An orbital that penetrates into the region occupied by core electrons experiences more nuclear charge and is therefore less shielded, leading to a higher energy. This is due to the increased attraction between the nucleus and electrons, which makes it more difficult to remove the electron from the atom. Option B is incorrect because an orbital that does not penetrate into the region occupied by core electrons experiences more shielding and therefore has a lower energy. Option C is incorrect because the Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. Option D is incorrect because the Pauli exclusion principle also requires that two electrons in the same orbital must have opposite spins.

Question 12

When filling degenerate orbitals,electrons fill them singly at first,with parallel spins.This is know as
A)Aufbau principle.
B)Heisenberg uncertainty principle.
C)Hund's rule.
D)Pauli exclusion principle.

Accepted Answer

This is known as Hund's rule which states that when filling degenerate orbitals, electrons will fill them singly with parallel spins before they pair up. This results in the maximum spin alignment, which minimizes the energy of the system. The Aufbau principle states that electrons will fill the lowest energy orbitals first, the Heisenberg uncertainty principle is a fundamental principle of quantum mechanics, and the Pauli exclusion principle states that no two electrons in an atom can have the same set of quantum numbers.

Question 13

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle)to the Cl atom. A)n = 3,l = 1,m_l = 1,m_s = + B)n = 3,l = 0,m_l = 1,m_s = - C)n = 3,l = 2,m_l =1 ,m_s = + D)n = 2,l = 1,m_l = 1,m_s = - E)n = 3,l =2 ,m_l = 1,m_s = -

Accepted Answer

The answer of Give the set of four quantum numbers...

Question 14

Identify the element that has a ground state electronic configuration of [Ar] 4s²3d¹⁰4p¹. A)Al B)In C)Ga D)B

Accepted Answer

Gallium (Ga) has the ground state electronic configuration of [Ar] 4s²3d¹⁰4p¹.

Question 15

No two electrons can have the same four quantum number is known as
A)Pauli exclusion principle.
B)Hund's rule.
C)Aufbau principle.
D)Heisenberg uncertainty principle.

Accepted Answer

Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. This means that in any given atom, no two electrons can occupy the same energy state simultaneously.

Question 16

Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle)to the Zn atom. A)n = 4,l = 3,m_l = 3,m_s = - B)n = 3,l = 2,m_l = 2,m_s = - C)n = 3,l = 1,m_l = 1,m_s = + D)n = 3,l = 3,m_l = 2,m_s = - E)n = 4,l = 2,m_l = 0,m_s = +

Accepted Answer

According to the Aufbau principle, the electrons fill up the lowest energy level first, and then successively fill higher energy levels until all electrons have been accounted for. Starting with the Zn atom, which has atomic number 30, we can fill the electrons in the 1s, 2s, and 2p orbitals (up to 10 electrons). The next energy level is 3, so the last electron would be added to a 3d orbital. Therefore, the set of four quantum numbers that represent the last electron added would be n=3, l=2, ml=0 (since there is only one electron in the 3d orbital), and ms=-1/2 (since Zn has a neutral charge, there are as many electrons with spin-up (+1/2) as there are with spin-down (-1/2)). This corresponds to choice B.

Question 17

Identify the element that has a ground state electronic configuration of [Kr] 5s²4d⁵. A)Tc B)Mn C)Nb D)Ru

Accepted Answer

The answer of Identify the element that has a ground...

Question 18

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle)to the Sr atom. A)n = 5,l = 0,m_l = 0,m_s = - B)n = 4,l = 1,m_l = 1,m_s = - C)n = 5,l = 1,m_l = 0,m_s = + D)n = 4,l = 1,m_l = -1,m_s = + E)n = 5,l = 1,m_l =1 ,m_s = -

Accepted Answer

The answer of Give the set of four quantum numbers...

Question 19

How many unpaired electrons are present in the ground state Kr atom?
A)1
B)2
C)0
D)3
E)5

Accepted Answer

The electron configuration of Kr is [Ar] 3d10 4s2 4p6. All the orbitals are filled and there are no unpaired electrons. Therefore, the answer is C (0 unpaired electrons).

Question 20

Give the ground state electron configuration for Se. A)[Ar] 4s²3d¹⁰4p⁴ B)[Ar] 4s²4d¹⁰4p⁴ C)[Ar] 4s²3d¹⁰4p⁶ D)[Ar] 4s²3d¹⁰ E)[Ar] 3d¹⁰4p⁴

Accepted Answer

The answer of Give the ground state electron configuration for...

Quiz 8: Periodic Properties of the Elements

Choose the orbital diagram that represents the ground state of N.

Give the ground state electron configuration for Cd.

Give the ground state electron configuration for Pb.

Choose the valence orbital diagram that represents the Si.

Choose the valence orbital diagram that represents the ground state of Zn.

How many unpaired electrons are present in the ground state Ge atom?

Write out the orbital diagram that represents the ground state of As.How many unpaired electrons are there?

Give the ground state electron configuration for Sr.

How many unpaired electrons are present in the ground state P atom?

Give the ground state electron configuration for I.

Which of the following statements is true?

When filling degenerate orbitals,electrons fill them singly at first,with parallel spins.This is know as

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Cl atom.

Identify the element that has a ground state electronic configuration of [Ar] 4s²3d¹⁰4p¹.

No two electrons can have the same four quantum number is known as

Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle) to the Zn atom.

Identify the element that has a ground state electronic configuration of [Kr] 5s²4d⁵.

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Sr atom.

How many unpaired electrons are present in the ground state Kr atom?

Give the ground state electron configuration for Se.