Question

[Ar] 4s13d5 is the configuration of ___________

a) Mg

b) Ca

c) Cr

d) Mn​

Answer 1

Answer:

option 3 is your answer

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Answer 2

Answer:

Cr

Explanation:

Atomic number of Chromuim is 24. Hence 1s2 2s2 2p6 3s2 3p6 4s1 3d5.4s2 3d4 is written as 4s1 3d5 because half filled d orbital is more stable. We can also write it along with noble gas electronic configuration, that is Ar argon [Ar], because 1s2 2s2 2p6 3s2 3p6 is the electronic configuration of Argon. so it can be written as [Ar] 4s1 3d5.