WorksheetsS2-Q4-Quantum numbers and electronic configuration
Total questions: 20
Worksheet time: 1hrs 15mins
The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is ---------
3
6
8
10
The magnetic quantum number (ml), has value within -------
1,2,3,4,5,6,7.
0, 1, 2, 3.
-l to +l
-1/2 and +1/2
A theory stating that electrons have the trend of taking the orbitals from the lowest energy level to the highest is the theory of... .
Pauli exclusion’s principle
building up principle
Hund’s rule
Heisenberg’s probability
the following are the examples of the electron configuration which can be abbreviated with noble gas notation, except... .
1s1
1s2 2s2
1s2 2s2 2p3
1s2 2s2 2p6 3s2 3p6 4s2 3d7
Below are the correct answer of the writing of electron configuration, except... .
6f2
2p5
3d7
4s3
A theory stating that it is forbidden for 2 electrons having the same values of the four atomic quantum numbers is explained by... .
Hund
Aufbau
Pauli
Schrodinger
How many orbitals are available to hold electrons in the 6th energy level (n=6)?
9
16
26
36
What is the total number of energy sublevels used by an atom of aluminum
(Al13) in the ground state?
3
7
13
5
Which of the following quantum number sets is not allowed?
[n=2 ; l=1 ; ml=+1` ; ms=+1/2 ]
[n=3 ; l=2 ; ml=+2 ; ms=+1/2 ]
[n=2 ; l=2 ; ml=+2 ; ms=+1/2 ]
[n=1 ; l=0 ; ml=0 ; ms=-1/2 ]
Which of the following quantum number sets is not allowed? .........................................[there is more than one ]
[n=2 ; l=2 ; ml=+2 ; ms=+1/2 ]
[n=2 ; l=1 ; ml=+1 ; ms=+1/2 ]
[n=5 ; l=0 ; ml=+1 ; ms=+1/2 ]
[n=3 ; l=2 ; ml=2 ; ms=+1/2 ]
[n=4 ; l=2 ; ml=+1 ; ms=1/2 ]
Which of the following quantum number sets is not allowed?
{ 3, 2, +1, -1/2 }
{ 5, 3, -1, +1/2 }
{ 6, 1, +2, +1/2 }
{ 7, 2, -2, -1/2 }
How many valence electrons are in an atom of sulfur S16? ................ [you should make the configuration]
2
4
6
8
How many unpaired electrons are in an atom of strontium? (Sr38)
0
1
2
3
Which one of the following does not represent the electronic configuration of an atom in its ground state?
1s2 2s2 2p3
1s2 2s2 2p4
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3d1
Which one of the following is the maximum number of atomic orbitals having a principal quantum number of two?
2
4
8
9
The number of electrons in the 3d orbital of the atom of atomic number 27 is
5
6
7
10
When
l = 1which of the following is the correct orbital that exist? You can choose more than one answer.
dxy
Px
Py
Pz
A region in space where there is a high probability of finding an electron in an atom or molecule is known as
shell
orbital
orbit
electron cloud
What is the shape of d orbital
sphere
clover leaf
dumbell
