Practice
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?
- 4d3
- 3d5
- 2s3
- 1s1
- 2p2
The maximum number of electrons that can be accommodated in 3s subshell is
- 10
- 2
- 6
- 1
- 8
The following electron configuration is incorrect according to the Pauli exclusion principle:
- 1s22s2
- 1s22s32p3
- 1s22s22p5
- 1s22s22p4
- 1s22s22p63s2
Which electron configuration represents an excited state of the indicated atom?
- He: 1s2
- Na: 1s2 2s2 2p6 3s2 3p2 3s1
- P: 1s2 2s2 2p6 3s2 3p3
- N: 1s2 2s2 2p23s1
- Ne: 1s2 2s2 2p6
Which of the following represents the ground state electron configuration of a transition element?
- 1s22s22p63s23p5
- 1s2 2s2 2p6 3s2 3p63d104s1
- 1s22s22p63s23p63d104s24p4
- 1s22s22p63s23p64s2
- 1s22s22p3
Which of the following is the correct ground-state electron configuration of V is?
- 1s22s22p63s23p63d3
- 1s22s22p63s23p63d5
- 1s22s22p63s24s23d3
- 1s22s22p63s23p64s23d5
- 1s22s22p63s23p64s23d3
Which of the following represents a possible excited-state electron configuration for an iron atom?
- [Ar]3d74s2
- [Ar]3d64s2
- [Ar]3d74s1
- [Ar]3d64s1
- [Kr]3d74s1
Each of the following is an accurate representation of ground-state electron configuration except:
- Fe: [Ar]4s23d6.
- Ca: [Ar]4s2.
- Se: [Ar] 4s23d104p4.
- Ag: [Kr] 5s24d9.
- Ti: [Ar] 4s2 3d2
How many electrons, in total, are present in p orbitals in a ground-state nickel atom?
- 8
- 12
- 6
- 24
- 3
Which one of the following represents electron configuration of an excited carbon atom?
- 1s22s22p3
- 1s22s22p1
- 1s22s22p13s1
- 1s22s23s1
- 1s22s22p2
Which of the following ground-state electron configurations is incorrect?
- Cl: [Ne]3s23p5
- Ge: [Ar] 4s2 3d103p2
- Co: [Ar]4s23d7
- Rb: [Kr]5s1
- Mn: [Ar] 4s23d5
What is the ground-state electron configuration of chromium (Cr)?
- 1s22s22p63s23p63d104s24p64d105s25p4
- 1s2 2s2 2p6 3s2 3p6 4s1 3d5
- 1s22s22p63s23p63d10
- 1s2 2s2 2p6 3s2 3p6 4s23d4
- 1s2 2s2 2p6 3s2 3p63d6
What is the ground-state electron configuration of bromine (Br)?
- 1s2 2s2 2p6 3s2 3p6 4s1 3d10 4p5
- [Kr] 4s23s104p5
- [Ne] 3s2 3p5
- [Ar] 4s23d104p5
- 1s2 2s2 2p5 3s2 3p6 4s2 3d10 4p5
The ground state electron configuration of As is ________.
- 1s22s23s23p64s23d104p2
- 1s22s22p63s23p64s23d104p1
- 1s22s22p63s23p64s23d104p3
- 1s22s22p63s23p64s23d104d3
- [Kr]4s23d104d3
Which of the following elements has the same valence-shell electron configuration as lithium?
- calcium.
- sulfur.
- potassium.
- magnesium.
- argon.
How many unpaired electrons are found in the d orbital of nickel.
- 4 electrons
- 3 electrons
- 2 electrons
- 8 electrons
- none of these
The ground-state electron configuration of the element ________ is [Kr]5s24d10
- Fe
- Cd
- Cr
- Mn
- Zn
The ground-state electron configuration of ________ is [Ar]4s23d7.
- Ti
- Co
- Fe
- Cr
- Cs
Chlorine has the following ground-state configuration:
- [He]3s23p2
- [Ne]3s23p5
- [He]2s22p5
- [Ne]2s22p3
- [He]3s23p5
What is the maximum number of electrons that can be accommodated in each d-subshell?
- 10
- 5
- 6
- 3
- 2
What noble gas core should be used when writing the condensed electron configuration of Strontium (Sr)?
- [Xe]
- [Kr]
- [Ne]
- [Ar]
- [He]
Electron Configuration of Ions
Which of the following is the ground state electron configuration of S2-?
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 Ti2⁺.
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 Zn2⁺?
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 Cr3⁺?
A) [Ar]
B) [Ar]4s13d2
C) [Ar]3d3
D) [Ar]4s23d1
E) [Ar]4s23d7
How many valence electrons are present in the azide (N3-) 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 Fe3⁺?
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