Iodine :
Define: Iodine is non metal which is place in halogen family. It is place in between bromine and Astatine. Iodine is heaviest gas and stable. It show solid state and lustrous, shiny properties. When it is heated it gives purple vapour. It is found in sea water and in marine pools.
Iodine is essential for human. In human body require 0.1 milligram iodine for Thyroid gland. If deficiency of iodine is present in body cause Goitre
Discovery : Iodine is discovered in1811 by scientist Bernard Courtois
Origin of name :. The name iodine is derived from Greek word ‘ Iodes’
Meaning of this word is Violet
Physical properties :
Atomic symbol: iodine is denoted by symbol I
Atomic number : atomic number of Iodine is 53
In iodine 53 proton and 53 electron is present
Atomic weight/ mass: atomic weight of iodine is 126.9Amu
In iodine 53 proton and 74 neutron is present
Position : iodine place in periodic table at 5th row (period) and 17th column ( group)
Block : iodine place in p block
Colour :iodine show purple black colour
Nature : Iodine show solid form in nature
Boiling point :boiling point of Iodine is 184.4 0C
Melting point :melting point of iodine is 113.7 0C
Isotopes:
Iodine show only 1 stable isotopes
127I : atomic weight of this isotope is 126.9 Amu
In this isotope 53 proton and 74 neutron is present
It is present 100% in nature
Iodine also show radio active isotope
Chemical properties :
Electronic configuration
Electronic configuration of Iodine is [kr] 4d10 5S2 5P5
Electronic configuration in concert of shell is 2,8,18 , 18,7
Electronic structure
Valency :iodine show valency1
Atomic radius : Atomic radius of Iodine is 115 Pm
Uses:
Its salt form is use in pharmaceutical. It is use as disinfectant
Iodine is use in printing inks and dyes.
Iodine is use as catalyst
It is mainly use to make polarising filter for LED display
Small amount of iodine is add in table salt to avoid iodine deficiency
Iodine 131 isotope is use to treat thyroid cancer
It’s iodoform is use as antiseptic
It is firstly use to make photograph
Iodine is use for the test of starch
It is also help to lower the body pressure, it is essential during pregnancy and help to control weight
It have tendency to protect from Radiation.
Question and Answer:
Q1. Define Iodine
Q2. Who discovered Iodine?
Q2. Physical properties of Iodine
Q4. Write Atomic Symbol of Iodine.
Q5. Write the Atomic number of Iodine.
Q6. On which block Iodine element is present?
Q7. What is the color of Iodine?
Q8. What is the Boiling point of Iodine?
Q9. What is the Melting point of Iodine?
Q10. Write the Isotopes of Iodine.
Q11. Show Electronic configuration of Iodine.
Q12. Write Electronic Structure of Iodine.
Q13. What is the Valency of Iodine?
Q14. Write the uses of Iodine element.