Bromine

Bromine 79.904(1)   Br 35 1s22s22p63s23p63d104s2 4p5 [ ? ] Halogen: Properties: Heavy, mobile, fuming red-brown liquid at room temperature.

Bromine is a chemical element, having the chemical symbol Br. Its atomic number (the number of protons) is 35. It has a standard atomic weight of 79.904 g•mol ⁻¹ and, at room temperature, is a liquid in its elemental form.

Bromine is considered to be a member of the "Halogen" class of element. At a pressure of 101.325 kPa, it has a boiling point of 58.8 °C and a melting point of −7.2 °C.