Question

Identify the number of metalloids from the following: Sb, Be, P, Ge, Te, S, Cs, Tc, I

• A. 3
• B. 4
• C. 5
• D. 2

Hint:

Memorize common metalloids: Ge, As, Sb, Te core; B, Si often included. Check properties like semiconductivity. Exclude clear metals (alkali, transition) and nonmetals (halogens, chalcogens).

Answer 1

The Correct Option is A

1. Metalloids exhibit properties intermediate between metals and nonmetals, typically along the staircase in the p-block.
2. Standard metalloids: B, Si, Ge, As, Sb, Te, Po, At.
3. From the list: Sb (antimony) – yes; Ge (germanium) – yes; Te (tellurium) – yes.
4. Be (beryllium) – metal; P (phosphorus) – nonmetal; S (sulfur) – nonmetal; Cs (cesium) – metal; Tc (technetium) – metal; I (iodine) – nonmetal.
5. Thus, 3 metalloids.
6. Therefore, the correct option is (1) 3.