Answer: Sb is the answer
Some extra relevant information:
Antimony is a chemical element with the symbol Sb, derived from the Latin word “stibium.” It is a lustrous gray metalloid that belongs to the nitrogen group of elements on the periodic table. With atomic number 51, antimony has a relatively low melting point and is commonly used in several industrial applications. Its symbol Sb comes from the original name Stibium, which has been in use since ancient times. This versatile metalloid finds its application in various fields, including the production of flame-retardant materials, semiconductors, and medicines.