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 of Bromine is [ Ar] 4S23d10 4P5
Electronic configuration in concert of shell 2,8,18,7
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.