Electronic Configuration of Elements 21-30 with Valency

21. Scandium (Sc)
- Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
- Valency: Scandium has a valency of +3. It loses its three valence electrons from the 3d orbital to achieve a stable configuration.

22. Titanium (Ti)
- Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²
- Valency: Titanium has a valency of +2 or +4. It can either lose its two 4s electrons or gain two additional electrons to fill its 3d orbital.

23. Vanadium (V)
- Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³
- Valency: Vanadium has a valency of +2, +3, +4, or +5. It can lose two 4s electrons and either one or two 3d electrons or gain electrons to fill its 3d orbital.

24. Chromium (Cr)
- Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵
- Valency: Chromium has a valency of +2, +3, or +6. It can lose its 4s and one or two 3d electrons or gain four electrons to fill its 3d and 4s orbitals.

25. Manganese (Mn)
- Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
- Valency: Manganese has a valency of +2, +4, +6, or +7. It can lose its 4s and one or two 3d electrons or gain three or two electrons to fill its 3d and 4s orbitals.

26. Iron (Fe)
- Electronic Configuration: 1s²