Question

In the modern periodic table, the elements present in groups are called d-block elements.

• A. 13 to 18
• B. 1 to 7
• C. 5 to 13
• D. 3 to 12

Answer 1

The correct option is D 3 to 12

In the modern periodic table, the elements are classified into s, p, d and f blocks based on the subshell in which their last electron enters. The elements present in group 3 to 12 have their last electron in the outermost d-subshell. Therefore, these elements are called d-block elements.