the element having electronic configuration of (Ar) 3d3 4s2 belongs to
Answers
Answer:
4th period, group 5B
Explanation:
period number is shown by highest shell no. that is 4 in this ques. 3 electrons are present in d orbital hence element belongs to d block , 3electrons are present in vanadium ,3rd member of 3d series.
The electronic configuration (Ar) 3d³ 4s² belongs to the element Chromium (Cr).
Chromium is a transition metal with the atomic number 24, which means it has 24 electrons. The electron configuration for Chromium is:
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹
However, the 3d and 4s subshells are very close in energy, and in the case of Chromium, one of the electrons from the 4s subshell is promoted to the 3d subshell to give the configuration: (Ar) 3d³ 4s²
Where Ar is Argon and the electronic configuration of Argon is 1s² 2s² 2p⁶ 3s² 3p⁶
This configuration is unique to Chromium and its elements in the same group, such as Manganese (Mn) and Iron (Fe).
Hence,
The electronic configuration (Ar) 3d³ 4s² belongs to the element Chromium (Cr).
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