Bromine :

Bromine is liquid state element . It is 3rd lightest liquid . Bromine place in halogen family and lie properties in between chlorine and iodine .it is easily evaporated in atmosphere. Bromine is toxic in nature and gives sharp smell . Due to toxic nature it’s harmful to body like  irritation in eyes and effect on throat also irritation for skin .

It is did not affected by sea water . It is mostly found in sea water in shell fish .

Discovery :  it is discovered in 1826 by scientist Antoine serome Belard and Carl lowing

Origin of name :. The ne is originated from Greek word ‘ Bromis’ meaning of this word is stench

Physical properties :

Atomic symbol: atomic symbol of bromine is Br

Atomic number : atomic number of bromine is 35

In bromine 35 proton and 35 electron is present

Atomic weight/ mass: atomic weight of bromine is 79.9 approximately 80 Amu

In bromine 35 proton and 45 electron is present

Position : bromine is place in periodic table at 4 thperiod ( row) and 17th column ( group)

It is place in halogen family

Block : it is place in p block

Colour :. Bromine show red brown colour

Odour :. It gives sharp smell

Boiling point :boiling point of bromine is 58.8 0C

Melting point :melting point of bromine is – 7.20 C


Bromine show 2 stable isotopes

79Br: atomic weight of this isotope is 78.9

In this isotope 35 proton,35 electron and 44 neutron is present

It is present 50.59% in nature

81Br: atomic weight of this isotope is 80.9 Amu

In this isotope 35 proton , 35 electron and 49 neutron is present .

It is present 49.3% in present .

Chemical properties :

Electronic configuration

Electronic configuration of Bromine is [ Ar] 4S23d10 4P5

Electronic configuration in concert of shell 2,8,18,7

Electronic structure

Valency :valency of Bromine is 1

In outermost shell 1 electron is required to complete their octate

Atomic radius : atomic radius of Bromine is 94 Pm

Reactivity : Bromine is reactive than iodine (I) and less than fluorine (F) and chlorine (Cl)


Bromide form is use in film photography

Bromine is use in pharmaceutical industry

It is use as flame retardant

Bromine is also use in electronic device .

It is mostly use in medicine for the treatment of drug addicted person

Bromine is also use in water purification process.

It is use to make dye .

It is use in gasoline

It is also use in agriculture to make fumigant

Bromine salt is use to make hot tube

It is also use to make fireproof circuit board .


Question and Answer:

Q1. Define Bromine

Q2. Who discovered Bromine?

Q2. Physical properties of Bromine

Q4. Write Atomic Symbol of Bromine.

Q5. Write the Atomic number of Bromine.

Q6. On which block Bromine element is present?

Q7. What is the color of Bromine?

Q8. What is the Boiling point of Bromine?

Q9. What is the Melting point of Bromine?

Q10. Write the Isotopes of Bromine.

Q11. Show Electronic configuration of Bromine.

Q12. Write Electronic Structure of Bromine.

Q13. What is the Valency of Bromine?

Q14. Write the uses of Bromine element.

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