Match the following atomic number given in List I with the type of el…

The correct answer is option 2. A-iii, B-ii, C-iv, D-i.

List I	List II
A. 33	iii. Metalloid
B. 16	ii. Non-metal
C. 36	iv. Inert gas
D. 55	i. Metal

Let us explain in detail how each element corresponds to its classification based on its atomic number:

A. Atomic Number 33 (Arsenic, As)

Classification: Metalloid.

Arsenic is located in group 15 of the periodic table. Metalloids have properties that are intermediate between metals and non-metals. Arsenic exhibits such intermediate properties, making it a metalloid.

B. Atomic Number 16 (Sulphur, S)

Classification: Non-metal

Sulphur is located in group 16 of the periodic table. Non-metals are characterized by their lack of metallic properties such as high conductivity and luster. Sulphur is a typical non-metal, being brittle, lacking metallic luster, and being a poor conductor of electricity.

C. Atomic Number 36 (Krypton, Kr)

Classification: Inert gas

Krypton is located in group 18 of the periodic table, which is known as the noble gases or inert gases. These gases are characterized by their very low reactivity due to having complete valence electron shells. Krypton, like other noble gases, is chemically inert and non-reactive.

D. Atomic Number 55 (Cesium, Cs)

Classification: Metal

Cesium is located in group 1 of the periodic table, known as the alkali metals. Metals are characterized by their shiny appearance, high electrical and thermal conductivity, and malleability. Cesium is a typical alkali metal, exhibiting all these metallic properties.

With this detailed understanding, we match the elements to their respective types:

A (33, Arsenic) corresponds to iii (Metalloid)

B (16, Sulphur) corresponds to ii (Non-metal)

C (36, Krypton) corresponds to iv (Inert gas)

D (55, Cesium) corresponds to i (Metal)

Thus, the correct matching is: 2. A-iii, B-ii, C-iv, D-i