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WorksheetsChapter 5: Electronic Configuration S1T2
Total questions: 20
Worksheet time: 31mins
Which of the following statements regarding electronic orbitals is correct?
Each p-orbital can hold a maximum of three electrons.
The 3p-orbitals have a higher energy level than the 3s-orbital.
The three 3p-orbitals have slightly different energy levels.
The 1s-orbital has the same size and shape as the 2s-orbital.
What is the Aufbau principle?
Within an energy level, s orbitals are the lowest energy, followed by p, d and then f
The lower the principal quantum number (n) the lower the energy.
All three.
The Aufbau Principle states that electrons enter the lowest energy orbitals first.
Identify the rule that is being violated
Aufbau's Principle
Hund's Rule
Pauli's Exclusion Principle
Heisenberg uncertainty principle
All orbitals of equal energy (degenerate orbitals) are occupied by one electron before any single orbital is occupied by a second electron.
Aufbau Principle
Pauli's Exclusion Principle
Hund’s Rule
Core Notation
No two electrons in the same atom can have the same four quantum numbers.
Aufbau Principle
Pauli's Exclusion Principle
Hund’s Rule
Noble gas notation
Which is the electron configuration of 34Se2- ?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
1s2 2s2 2p6 3s2 3p6 3d7 4p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6
1s2 2s2 2p6 3s2 3p6 3d2 4s2 3d10 4p4
How many electrons can the third shell have?
Two
Eight
Five
Three
1s22s22p63s23p64s23d10
Which electronic configuration matches an oxygen atom?
1s22s22p63s2, 3p64s23d104p5
1s22s22p4
1s22s22p6
1s22s22p63s23p64s23d1
The electronic configuration of an atom is 1s22s22p6. The number of valence electrons in the atom is
3
6
8
10
Which one of the following is the electronic configuration of the bromine atom?
1s22s22p63s23p63d104s14p6
1s22s22p63s23p63d104s24p7
1s22s22p63s23p63d104s24p5
1s22s22p63s23p63d104s24p6
The number of electrons in the 3d orbital of the atom of atomic number 27 is
5
6
7
10
Write the electronic configuration for sodium Na (Z=11)
1s2 2s2 2p6
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3s2 3p4
Determine the element that has valence electron 3s23p1
Na
Al
Cl
Mg
Which of the orbital is called 'clover shaped'
s
p
d
f
Write one set of quantum number for 3p electron.
(3, 0, 0, +1/2)
(3, 1, 0, +1/2)
(3, 2, 0, +1/2)
(3, 0, 1, +1/2)
How many unpaired electron of electronic configuration for Sulphur, S (Z=16)
1
2
3
4
This is a ____ orbital
s
d
p
d
The principle quantum number, n, represents the:
spin value
suborbital value
energy level
magnetic value
How many electrons total are found in the f orbital?
2
6
10
14
