Find out the total number of elements of 3d series those are having completely full filled or half filled d-subshell in their ground state.
Question
Find out the total number of elements of 3d series those are having completely full filled or half filled d-subshell in their ground state.
Solution
The 3d series in the periodic table includes the elements from Scandium (Sc, atomic number 21) to Zinc (Zn, atomic number 30).
The electron configuration of these elements in their ground state is as follows:
- Sc (21) - [Ar] 3d1 4s2
- Ti (22) - [Ar] 3d2 4s2
- V (23) - [Ar] 3d3 4s2
- Cr (24) - [Ar] 3d5 4s1
- Mn (25) - [Ar] 3d5 4s2
- Fe (26) - [Ar] 3d6 4s2
- Co (27) - [Ar] 3d7 4s2
- Ni (28) - [Ar] 3d8 4s2
- Cu (29) - [Ar] 3d10 4s1
- Zn (30) - [Ar] 3d10 4s2
From the above, the elements with half-filled (d5) or fully-filled (d10) d-subshells in their ground state are Chromium (Cr), Manganese (Mn), Copper (Cu), and Zinc (Zn).
So, there are 4 elements in the 3d series that have either half-filled or fully-filled d-subshells in their ground state.
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