Question

A representative element that is metal is:
(A) Zn
(B) Sr
(C) Fe
(D) Cu

Answer 1

Hint The main group is the group of elements, which is also known as representative elements. The lightest members are represented by Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, oxygen, and fluorine, as arranged in the periodic table.

Complete answer:
- The representative elements are the elements present within the first two families on i.e., Group I and II on the far left, and the last six families or groups (on the right) of the periodic table. So, only s-block and p-block elements only are called representative elements.
- These elements are called so because their outer shells are not completely filled with electrons.
- Representative elements are known to chemically active species. They undergo chemical reactions to attain the nearest noble gas configuration by losing, gaining, or sharing electrons.
- The d-block elements are not considered as representative elements.
- In the question, Zn, Fe, and Cu belong to the d-block. Whereas, Sr is a p-block element.

- Therefore, the answer to the question is (B) Sr.

Additional information:
There are approximately 20 nonradioactive representative metals in groups 1, 2, 3, 12, 13, 14, and 15 of the periodic table.

Note: A few metals, all the nonmetals and metalloids are representative elements. S-block elements are placed at left side and p-block elements are placed at the right side of the periodic table i.e., representative elements are placed at left and right side of the periodic table.