Question

The atomic numbers of elements of 4d series lie in the range of
1.38 to 40
2.39 to 48
3.40 to 49
4.41 to 50

Answer 1

Explanation:

c. 39to48

Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, and Cd.

Answer 2

Answer:

The correct option is (2) 39 to 40.

Explanation:

• The second transition series in the periodic table is also known as the 4d series.
• This series is in the fifth period of the periodic table.
• The elements in this series occupy the 4d orbital.
• The elements are between Y to Cd. Y has the atomic number of 39 and Cr has the atomic number of 48.
• These are transition metals and varying oxidation states.
• They form different colored compounds.
• They also form stable compounds and can be used as catalysts.

Conclusion:

The atomic number of the 4d series lies in the range of 39-48.