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WorksheetsElectron configuration, Orbital filling order & Quantum #'s.
Total questions: 20
Worksheet time: 11mins
In an atom no two electrons can have the same value for all Quantum numbers this was proposed by _______
Hund
Pauli
Dalton
Avogadro
The increasing order of energy of the orbital 1S , 2S and 2P is
2P < 2S < 1S
2S < 2P <1S
1S< 2S <2P
2P> 1S >2S
No two electrons in an atom can have:
The same principal quantum number only
The azimuthal quantum number only
The same magnetic quantum number only
An identical set of four quantum number
according to aufbau principle , the 19th electron in an atom goes into the ___________________
4s-orbitals
3d-orbitals
4p-orbitals
3p-orbitals
Which of the following explain the sequence of filling electrons in different shells?
Octet rule
Hund's rule
Aufbau rule
All the above
Any p - orbitals can accommodate upto____
4 electrons
6 electrons
2 electrons with parallel spin
2 electrons with opposite spin
Nitrogen atom has three unpaired electrons because of ________
Pauli;s exclusion principle
Aufbau principle
Hund's rule
Uncertainty principle
two electrons present in an orbital will differ in their
principle quantum number
Azimuthal quantum number
Magnetic quantum number
spin quantum number
1s22s22p63s23p64s23d10
Which set of quantum numbers uniquely defines one of the electrons in an atomic orbital with n = 2 and l = 0?
n = 2, l = 0, m = 0, s = +½
n = 2, l = 0, m = 1, s = +½
n = 2, l = 0, m = 1, s = +1
n = 2, l = 0, m = 0, s = +1
Which element has the ground state electronic configuration 1s22s22p63s23p5?
Si
P
Cl
S
What is the electronic configuration of a iron(II) ion Fe2+?
(Proton number Fe = 26)
1s22s22p6
1s22s22p63s13p63d6
1s22s22p63s23p63d6
1s22s22p63s23p64s23d4
Which of the following sets of quantum numbers would represent an electron in a 3d orbital?
(3, 2, +3, +½)
(3, 2, +1, -½)
(3, 1, +1, +½)
(3, 1, 0, +½)
Which electron configuration belongs to a Chloride (Cl-) ion?
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p7
1s2 2s2 2p6 3p7
