Which chemical element with atomic number is 31?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Gallium.
The chemical element with atomic number 31 is Gallium (Ga). Gallium is a soft, silvery metal in the periodic table and belongs to group 13. It has unique properties such as a low melting point (just above room temperature), which allows it to melt in your hand. Gallium is used in electronics, LED technology, and as a component in various alloys. It was discovered in 1875 by the French chemist Paul-Émile Lecoq de Boisbaudran.