Indium ( In ) :
Indium is semi metal . It is also called transition metal . It is soft in nature. It is stable element but toxic in nature. It is found in earth crust . It show some metallic and non metallic properties
Discovery : Indium is discovered in 1863 by scientist Ferdinand Reich and Hierinymous Richter .
Origin of name :. The name is derived from Latin word ‘ indicium ‘ meaning of this word is violet or indigo
Physical properties :
Atomic symbol: indium is denoted by symbol In
Atomic number : atomic number of Indium is 49
In indium 49 proton and 49 electron is present.
Atomic weight/ mass: atomic weight of indium is 114.8 Amu
In indium 49 proton ,49 electron and 66 neutron is present
Position : Indium is place in periodic table at 5th row (period) and 13th column ( group )
Block : Indium place in p block
Colour : indium show silvery white colour.
Nature :. Indium show solid form in nature
Boiling point : boiling point of Indium is 2027 0C
Melting point : melting point of Indium is 156 0C
Isotopes:
Indium show only 1 stable isotopes
115In: atomic weight of this isotope is 114.9 Amu
In this isotope 49 proton, 49 electron and 66 neutron is present.
It is present 95.7% in nature
Chemical properties :
Electronic configuration
Electronic configuration of Indium is [ kr] 4d105S2 5P1
Electronic configuration in concert of shell is 2,8,18,18,3
Electronic structure
Valency :valency of indium is 3
Atomic radius : atomic radius of indium is 156 Pm
Uses:
Indium is use in semiconductor device which is use in transistors
Its alloy form use in Fire sprinkler it have low melting point hence it is use in fire sprinklers
It is also use to make mirrors
Indium is use as photoconductor
It is used as rectifiers and used in alternating current
Indium is use in solders .
It is mostly used to coat the bearing the high speed motors.
Question and Answer:
Q1. Define Indium
Q2. Who discovered Indium ?
Q2. Physical properties of Indium
Q4. Write Atomic Symbol of Indium.
Q5. Write the Atomic number of Indium.
Q6. On which block Indium element is present?
Q7. What is the color of Indium?
Q8. What is the Boiling point of Indium?
Q9. What is the Melting point of Indium?
Q10. Write the Isotopes of Indium.
Q11. Show Electronic configuration of Indium.
Q12. Write Electronic Structure of Indium.
Q13. What is the Valency of Indium?
Q14. Write the uses of Indium element.