Bromine Element in Periodic Table | Atomic Number Atomic Mass

Bromine Element:

Bromine is the third –lightest element in the halogen family. It is a chemical element and it is a member of group 17 and period 4 in the periodic table. Atomic number of bromine is 35 and it is indicated by symbol is Br. Br belongs to the halogen family. Chlorine, Iodine and Astatine are the other elements in the halogen family.  Bromine-79 and bromine-81 are the natural isotopes of bromine. Br is a very reactive element and thus does not occur in a free state in nature.

Uses:

• The important use of bromine today is making flame retardant materials.
• Br is also used in the manufacture of pesticides, chemicals used to kill pests.
• Bromine compounds have become more popular for their superior bacteria killing power.
• Organobromide is used in halogen fire extinguishers that are used to fight fires in places like museums, aeroplanes and tanks.
• Silver bromide is a chemical used in film photography.

Bromine Element Information:

Discovery year:1825

Discovered by: Antoine Jérôme Balard and Carl Jacob Löwig

Atomic number: 35

Relative atomic mass: 79.904 

Electron configuration: [Ar] 3d¹⁰ 4s² 4p⁵

Block: p-block

Other elements in the same block:

Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Gallium, Germanium, Arsenic, Selenium, Krypton, Indium, Tin, Antimony, Tellurium, Iodine, Xenon, Thallium, Lead, Bismuth, Polonium, Astatine, Radon, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson are the same block elements.

Period: period 4

Other elements in the same period:

Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium and Krypton.

Group: group 17 (halogens)

Other elements in the same group:

Fluorine, Chlorine, Iodine, Astatine and Tennessine are the same group elements.

Other elements in the same orbital:

Gallium, Germanium, Arsenic, Selenium and Krypton are the elements in the same orbital.

Allotropes: none

Key isotopes: ⁷⁹Br

Melting point: −7.2°C, 19°F, 266 K 

Boiling point: 58.8°C, 137.8°F, 332 K

Element category:  diatomic non-metal

Density (g cm⁻³): 3.1028

CAS number: 7726-95-6

Color: reddish-brown

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