Question

All the s-block elements of the periodic table are placed in the groups ....

• A. IA and IIA
• B. IIIA and IVA
• C. B sub groups
• D. VA to VIIA

Hint:

s-block: Groups 1 and 2; p-block: Groups 13-18.

Answer 1

The Correct Option is A

The question asks about the placement of s-block elements in the periodic table. To determine which groups these elements belong to, we can refer to the structure of the periodic table, where different blocks are defined based on the electron configuration of the elements.

Step-by-step Explanation:

1. The periodic table is divided into four blocks: s, p, d, and f, based on their electron subshell filling.

2. The outermost electron of s-block elements occupies the s-orbital, which can hold a maximum of 2 electrons.

3. The s-block elements are found in two specific groups: Group 1 (IA) and Group 2 (IIA).

4. Group 1 elements are known as alkali metals and include lithium (Li), sodium (Na), potassium (K), etc.

5. Group 2 elements are known as alkaline earth metals and include beryllium (Be), magnesium (Mg), calcium (Ca), etc.

Conclusion:

Given the explanation, we can confirm that the s-block elements of the periodic table are placed in groups IA and IIA. The correct answer is IA and IIA.