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Number of groups in d-block...

Number of groups in d-block

A

5

B

10

C

15

D

20

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Identify the d-block Elements:** - The d-block elements are located in the middle of the periodic table. They are characterized by the presence of d-orbitals being filled with electrons. 2. **Determine the Range of Groups:** - The d-block elements start from Group 3 and extend to Group 12 in the periodic table. 3. **Count the Number of Groups:** - To find the total number of groups in the d-block, we can list the groups: - Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 10, Group 11, and Group 12. - Counting these gives us a total of 10 groups. 4. **Conclusion:** - Therefore, the number of groups in the d-block is 10. **Final Answer:** - The number of groups in the d-block is **10**. ---
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