The 'spin only' magnetic moment value of is BM. (Where M is a metal having least metallic radii among Sc, Ti, V, Cr, Mn and Zn).

(Given atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25 and

Question

The 'spin only' magnetic moment value of  is  BM. (Where M is a metal having least metallic radii among Sc, Ti, V, Cr, Mn and Zn).

(Given atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25 and Zn = 30)

Canvas Classes · Accepted Answer

Step 1: Find the metal with least metallic radius

Across the first-row transition metals, atomic radius generally decreases then increases slightly. The metal with the smallest atomic radius among Sc, Ti, V, Cr, Mn, Zn is Mn (Z=25).

Actually, the trend shows Mn has a slightly larger radius than expected due to half-filled  stability. The smallest radius in the series is typically around Cr or Mn.

However, for  with M in high oxidation state:
- If M = Mn:  (manganate), Mn = +6,  → 1 unpaired e

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