Which of the following elements are metals? (This question has multiple correct option)A) Calcium B) Chlorine C) Potassium D) Sulphur

To determine which of the given elements are metals, we need to recall the classification of elements in the periodic table.

Explanation:
Calcium (Ca): Calcium is an alkaline earth metal found in Group 2 of the periodic table. It is a reactive metal, commonly known for its role in biological systems (such as bones).

Calcium is a metal.
Chlorine (Cl): Chlorine is a halogen found in Group 17. It is a non-metal and is a highly reactive gas at room temperature, commonly used in disinfectants and bleach.

Chlorine is not a metal.
Potassium (K): Potassium is an alkali metal found in Group 1 of the periodic table. It is very reactive, especially with water, and is essential for biological functions.

Potassium is a metal.
Sulfur (S): Sulfur is a non-metal found in Group 16. It is typically found as a yellow solid and is not conductive or malleable, which are properties of metals.

Sulfur is not a metal.
Correct answer:
A) Calcium
C) Potassium