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WorksheetsXI Chemistry Unit 2 Part 6A
Total questions: 10
Worksheet time: 5mins
_____ describes how the electrons are filled in various orbitals.
Aufbau principle
Pauli exclusion principle
Hund’s rule
Heisenberg’s uncertainty principle
Only _____ electrons can be accommodated in a given orbital in accordance with Pauli’s exclusion principle.
1
2
3
4
Once the higher energy orbitals are completely filled, then the electrons enter the next lower energy orbitals.
True
False
Find out the quantum numbers of second electron in L – shell.
n = 2, l = 0, m = 0, s = +1/2
n = 2, l = 0, m = 0, s = -1/2
n = 2, l = 1, m = -1, s = +1/2
n = 2, l = 1, m = 0, s = +1/2
Which quantum number value of electron of hydrogen changes compared to second electron of helium?
n
l
ml
ms
_____ deals with the filling of electrons in the degenerate orbitals.
Aufbau principle
Pauli exclusion principle
Hund’s rule
Heisenberg’s uncertainty principle
Degenerate orbitals mean _____.
Completely filled orbitals
Partially filled orbitals
Orbitals having same energy
Orbitals having different energy
The energies of same orbital decrease with an increase in the atomic number.
True
False
The two values of spin quantum number are _____.
+1/2, -1/2
+1, -1
0, 1
+2, -2
According to Hund’s rule, pairing of electrons in p orbitals start only when the _____ electron enters.
first
second
third
fourth
