Question

Match List -I with List-II

LIST-I (Atomic number)	LIST-II (Block of periodic table)
(A) 37 (K)	I. p-block
(B) 78 (Pt)	II. d-block
(C) 52 (Te)	III. f-block
(D) 65 (Tb)	IV. s-block

Choose the correct answer from the options given below:

• A. A - IV, B - II, C - I, D - III
• B. A - IV, B - III, C - II, D - I
• C. A - I, B - III, C - IV, D - II
• D. A - II, B - IV, C - I, D - III

Hint:

To identify the block of an element, look at the atomic number and determine the type of orbital (s, p, d, f) being filled. This corresponds to the element’s position in the periodic table.

Answer 1

The Correct Option is A

Let's match the atomic numbers from List-I with the corresponding blocks of the periodic table from List-II.

1. Atomic Number 37 (K - Potassium): Potassium belongs to Group 1 of the periodic table, which is known as the alkali metals group. Elements in this group are part of the s-block because their outermost electrons are in the 's' orbital.
2. Atomic Number 78 (Pt - Platinum): Platinum is a transition metal, and all transition metals are located in the d-block of the periodic table where the d-subshell is being filled.
3. Atomic Number 52 (Te - Tellurium): Tellurium belongs to Group 16, which is part of the p-block of the periodic table. Elements in this block have their outermost electrons in the 'p' orbital.
4. Atomic Number 65 (Tb - Terbium): Terbium is a lanthanide, which is part of the f-block of the periodic table where 4f subshell is being filled.

Based on the above reasoning, we can match the atomic numbers to their corresponding blocks:

• A (37 - K) corresponds to IV. s-block.
• B (78 - Pt) corresponds to II. d-block.
• C (52 - Te) corresponds to I. p-block.
• D (65 - Tb) corresponds to III. f-block.

Thus, the correct matched option is: A - IV, B - II, C - I, D - III.