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The second series of transition element ...

The second series of transition element start with

A

Ytterium

B

Yttribium

C

Scandium

D

Rhodium

Text Solution

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The correct Answer is:
To solve the question regarding the starting element of the second series of transition elements, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Question**: We need to identify which element marks the beginning of the second series of transition elements. 2. **Recall the Series of Transition Elements**: Transition elements are found in the d-block of the periodic table. The second series of transition elements corresponds to the filling of the 4d orbitals. 3. **Identify the Starting Element**: The second series of transition elements starts with the element Yttrium (Y), which has an atomic number of 39. 4. **List the Elements in the Series**: The second transition series includes the following elements: - Yttrium (Y, atomic number 39) - Zirconium (Zr, atomic number 40) - Niobium (Nb, atomic number 41) - Molybdenum (Mo, atomic number 42) - Technetium (Tc, atomic number 43) - Ruthenium (Ru, atomic number 44) - Rhodium (Rh, atomic number 45) - Palladium (Pd, atomic number 46) - Silver (Ag, atomic number 47) - Cadmium (Cd, atomic number 48) 5. **Consider the Definition of Transition Elements**: Transition elements are characterized by having partially filled d-orbitals. Cadmium, despite being part of this series, is often not considered a transition metal because it has a fully filled d-orbital configuration. 6. **Select the Correct Option**: From the options provided, the correct answer is Yttrium (Y), which is the first element in the second series of transition elements. ### Final Answer: The second series of transition elements starts with **Yttrium (Y)**. ---
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