What are n, l and m value for 2px and 3pz electrons?


(i) For 2px1 electron:
n-2, l= 1, m =-1

(ii) For 3pz electron:
n = 3, l= 1, m = + l

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Arrange the following orbitals in order of increasing energy:3s, 2p, 4d, 3p, 5s

 


The order of increasing energy.
2p>3s> 3p> 5s> 4d.
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How many electrons are there in the valence quantum level of copper(Atomic, number = 29)?


Electronic configuration of copper is Ar[3d10 4s1]. Thus, one (4s1) valence quantum level for copper.
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The atomic number of a certain element is 17. Determine the number of electrons in each shell of the atom.


The electronic configuration of the element with atomic number 17 is


Thus:
(i) K shell has 2 electrons.
(ii) L shell has 8 electrons.
(iii) M shell has 7 electrons.

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How many number of unpaired electrons are present in the ground state of Fe3+?(Atomic number of Fe is 26). 


The electronic configuration for Fe is [Ar] 3d5 4s2. and the electronic configuration for  Fe3+ = |Ar| 3d5,
Number of unpaired electrons = 5
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