What is the maximum number of electrons that can occupy one p orbital?
a.14
b. 2
c. 10
d.1
e. 6

The n = 2 shell can accommodate a maximum of ____  electrons.
A. 10
B. 8
C. 4
D. 6
E. 2

Which of the following is an incorrect orbital occupancy representation?

1. 4d³
2. 3d⁵
3. 2s³
4. 1s¹
5. 2p²

The maximum number of electrons that can be accommodated in 3s subshell is

1. 10
2.  2
3. 6
4. 1
5. 8

The following electron configuration is incorrect according to the Pauli exclusion principle:

1. 1s²2s²
2. 1s²2s³2p³
3. 1s²2s²2p⁵
4. 1s²2s²2p⁴
5. 1s²2s²2p⁶3s²

Which electron configuration represents an excited state of the indicated atom?

1. He: 1s²
2. Na: 1s² 2s² 2p⁶ 3s² 3p² 3s¹
3. P: 1s² 2s² 2p⁶ 3s² 3p³
4. N: 1s² 2s² 2p²3s¹
5. Ne: 1s² 2s² 2p⁶

This element is in the p-block of the periodic table

1. Cs
2. In
3. Pd
4. He
5. Po

Which of the following represents the ground state electron configuration of a transition element?

1. 1s²2s²2p⁶3s²3p⁵
2. 1s² 2s² 2p⁶ 3s² 3p⁶3d¹⁰4s¹
3. 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁴
4. 1s²2s²2p⁶3s²3p⁶4s²
5. 1s²2s²2p³

Which of the following is the correct ground-state electron configuration of V is?

1. 1s²2s²2p⁶3s²3p⁶3d³
2. 1s²2s²2p⁶3s²3p⁶3d⁵
3. 1s²2s²2p⁶3s²4s²3d³
4. 1s²2s²2p⁶3s²3p⁶4s²3d⁵
5. 1s²2s²2p⁶3s²3p⁶4s²3d³

Which of the following represents a possible excited-state electron configuration for an iron atom?

1. [Ar]3d⁷4s²
2. [Ar]3d⁶4s²
3. [Ar]3d⁷4s¹
4. [Ar]3d⁶4s¹
5. [Kr]3d⁷4s¹

Each of the following is an accurate representation of ground-state electron configuration except:

1. Fe: [Ar]4s²3d⁶.
2. Ca: [Ar]4s².
3. Se: [Ar] 4s²3d¹⁰4p⁴.
4. Ag: [Kr] 5s²4d⁹.
5. Ti: [Ar] 4s² 3d²

How many electrons, in total, are present in p orbitals in a ground-state nickel atom?

1. 8
2. 12
3. 6
4. 24
5. 3

Which one of the following represents electron configuration of an excited carbon atom?

1. 1s²2s²2p³
2. 1s²2s²2p¹
3. 1s²2s²2p¹3s¹
4. 1s²2s²3s¹
5. 1s²2s²2p²

Which of the following ground-state electron configurations is incorrect?

1. Cl: [Ne]3s²3p⁵
2. Ge: [Ar] 4s² 3d¹⁰3p²
3. Co: [Ar]4s²3d⁷
4. Rb: [Kr]5s¹
5. Mn: [Ar] 4s²3d⁵

Bromine atom has ___ valence electrons.

1. 6
2. 4
3. 7
4. 5
5. 35

What is the ground-state electron configuration of chromium (Cr)?

1. 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁴
2. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵
3. 1s²2s²2p⁶3s²3p⁶3d¹⁰
4. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²3d⁴
5. 1s² 2s² 2p⁶ 3s² 3p⁶3d⁶

What is the ground-state electron configuration of bromine (Br)?

1. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰ 4p⁵
2. [Kr] 4s²3s¹⁰4p⁵
3. [Ne] 3s² 3p⁵
4. [Ar] 4s²3d¹⁰4p⁵
5. 1s² 2s² 2p⁵ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

The ground state electron configuration of As is ________.

1. 1s²2s²3s²3p⁶4s²3d¹⁰4p²
2. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹
3. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³
4. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4d³
5. [Kr]4s²3d¹⁰4d³

Which of the following elements has the same valence-shell electron configuration as lithium?

1. calcium.
2. sulfur.
3. potassium.
4. magnesium.
5. argon.

How many unpaired electrons are found in the d orbital of nickel.

1. 4 electrons
2. 3 electrons
3. 2 electrons
4. 8 electrons
5. none of these

The ground-state electron configuration of the element ________ is [Kr]5s²4d¹⁰

1. Fe
2. Cd
3. Cr
4. Mn
5. Zn

The ground-state electron configuration of ________ is [Ar]4s²3d⁷.

1. Ti
2. Co
3. Fe
4. Cr
5. Cs

Chlorine has the following ground-state configuration:

1. [He]3s²3p²
2. [Ne]3s²3p⁵
3. [He]2s²2p⁵
4. [Ne]2s²2p³
5. [He]3s²3p⁵

What is the maximum number of electrons that can be accommodated in each d-subshell?

1. 10
2. 5
3. 6
4. 3
5. 2

The 3p subshell of a sulfur atom contains ________ electrons.

1. 16
2. 8
3. 2
4. 4
5. 6

What noble gas core should be used when writing the condensed electron configuration of Strontium (Sr)?

1. [Xe]
2. [Kr]
3. [Ne]
4. [Ar]
5. [He]

Electron Configuration of Ions

Which of the following is the ground state electron configuration of S^2-?

A) [Ne]
B) [Ne]3s²3p⁶
C) [Ne]3s²3p⁴
D) [Ne]3s²3p²
E) [Ne]4s²

A cation of +3 indicates that an element has

A) lost three neutrons.
B) lost three protons.
C) lost three electrons.
D) gained three protons.
E) gained three electrons.

Indicate the ground state electron configuration for Cl⁻.

A) 1s²2s²2p⁶3s²3p⁴
B) 1s²2s²2p⁶3s²3p⁵
C) 1s²2s²2p⁶3s²3p⁶
D) 1s²2s²2p⁶3s¹3p⁶
E) 1s²2s²2p⁶3s³3p⁵

Which of the following is the ground state electron configuration of Ba²⁺ ?

A) [Kr]5s²4d¹⁰5p⁶6s²
B) [Kr]5s²4d¹⁰5p⁶
C) [Kr]5s²4d¹⁰5p⁶5d²
D) [Kr]5s²5p⁶
E) [Kr]5s²4d¹⁰5p⁶6s²

Which of the following is the ground state electron configuration of Ti^2⁺.

A) [Ar]3d⁴
B) [Ar]3d²
C) [Ar]4s²
D) [Ar]4s²3d⁴
E) [Ar]4s²3d²

Which of the following is the ground state electron configuration of Zn^2⁺?

A) [Ar]4s²3d⁶
B) [Ar]3d¹⁰
C) [Ar]4s²3d⁸
D) [Ar]3d⁸
E) [Ar]

Which of the following is the ground state electron configuration of Cr^3⁺?

A) [Ar]
B) [Ar]4s¹3d²
C) [Ar]3d³
D) [Ar]4s²3d¹
E) [Ar]4s²3d⁷

How many valence electrons are present in the azide (N^3-) ion?

A) 3
B) 5
C) 8
D) 7
E) 2

Ca²⁺ has the following ground state electron configuration:

A) 1s²2s²2p⁶
B) 1s²2s²2p⁶3s²
C) 1s²2s²2p⁶3s²3p²
D) 1s²2s²2p⁶3s²3p⁶4s²3d²
E) 1s²2s²2p⁶3s²3p⁶

Rb+ has the following ground state electron configuration:

A) [Kr]5s²4d⁶
B) [Kr]4s²
C) [Ar]4s²4p⁴
D) [Kr]5s¹
E) [Ar]4s²3d¹⁰4p⁶

Which of the following is the ground state electron configuration of Fe^3⁺?

A) [Ar]3d⁵
B) [Ar]4s¹3d³
C) [Ar]
D) [Ar]4s²3d⁹
E) [Ar]4s²3d¹

The correct ground state electron configuration for Br^– is:

A) [Ar]4s²3d¹⁰4p⁶
B) [Ar]4s²3d¹⁰4p³
C) [Ar]4s²3d⁸4p⁶
D) [Ar]4s²3d¹⁰4p⁵
E) [Ar]4s²4p⁶

How many electrons are present in the ground state of Mg²⁺ ion?

A) 2
B) 6
C) 10
D) 8
E) 12