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How many of these metals can show +3 oxi...

How many of these metals can show `+3` oxidation state also.
`Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn`

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To determine how many of the given metals can show a +3 oxidation state, we will analyze each metal based on its electronic configuration and the typical oxidation states it can exhibit. ### Step-by-Step Solution: 1. **Identify the Metals**: The metals given are Scandium (Sc), Titanium (Ti), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), Nickel (Ni), and Zinc (Zn). 2. **Determine Electronic Configurations**: - Scandium (Sc): Atomic number 21 → [Ar] 4s² 3d¹ - Titanium (Ti): Atomic number 22 → [Ar] 4s² 3d² - Vanadium (V): Atomic number 23 → [Ar] 4s² 3d³ - Chromium (Cr): Atomic number 24 → [Ar] 4s² 3d⁵ - Manganese (Mn): Atomic number 25 → [Ar] 4s² 3d⁵ - Iron (Fe): Atomic number 26 → [Ar] 4s² 3d⁶ - Cobalt (Co): Atomic number 27 → [Ar] 4s² 3d⁷ - Nickel (Ni): Atomic number 28 → [Ar] 4s² 3d⁸ - Zinc (Zn): Atomic number 30 → [Ar] 4s² 3d¹⁰ 3. **Analyze Possible Oxidation States**: - **Scandium (Sc)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Titanium (Ti)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Vanadium (V)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Chromium (Cr)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Manganese (Mn)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Iron (Fe)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Cobalt (Co)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Nickel (Ni)**: Can lose 3 electrons (2 from 4s and 1 from 3d) → +3 oxidation state possible. - **Zinc (Zn)**: Has a fully filled d-subshell (3d¹⁰), so it can only lose 2 electrons (from 4s) → +2 oxidation state only. 4. **Count the Metals with +3 Oxidation State**: - The metals that can exhibit a +3 oxidation state are: Sc, Ti, V, Cr, Mn, Fe, Co, Ni. - Total = 8 metals. ### Final Answer: **8 metals can show +3 oxidation state.** ---
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