Thulium (Tm) :
Define- Thulium is inner transition metal it is place at 12th number in inner transition metal.it is non toxic in nature and bright in shine. It is rarely found in earth crust . It is present in earth crust in the form of monazite minerals
It is least rarest element after the promethium element
Discovery : thulium is discovered in 1879 by scientist Per Teodorcleve
Origin of name :the name thulium is comes grin Thule . It is ancient name for ‘ Scandinavia ‘
Physical properties :
Atomic symbol: it is denoted by symbol Tm
Atomic number : atomic number of thulium is 69
In thulium 69 proton and 69 Electron present.
Atomic weight/ mass: Atomic weight of Thulium is 168.9 Amu
In thulium 69 proton and 69 Electron is present.
Position : it is present in 6 throw ( period) and in lanthanide group .
Block : it is place in f block
Colour : thulium show silvery white colour
Nature : it is present solid form
Boiling point :boiling point of Thulium is 1950 0C
Melting point :melting point of Thulium is 1545 0C
Isotopes: thulium show only 1 stable isotope
169Tm: atomic weight of this isotope is 168.9 Amu
In this isotope 69 proton, 69 Electron and 100 proton is present
It is present 100% in nature
Chemical properties :
Electronic configuration
Electronic configuration of Thulium is [ Xe] 4f13 6S2
Electronic configuration in concert of shell is 2, 8, 18,31, 8,2
Electronic structure
Valency : Valency of Thulium is 2 or 3
Atomic radius : Atomic radius of Thulium is 222 Pm
Uses:
Thulium is use in nuclear reactor.
It’s isotope emits x rays and use In medical use .
It give laser and use in surgical treatment.
Thulium use in microwave equipment
Thulium is use in ceramic as a magnetic material .
Thulium is mixed in stainless still for improve mechanical properties
Thulium is used in electrical equipment.
Question and Answer:
Q1. Define Thulium
Q2. Who discovered Thulium?
Q2. Physical properties of Thulium
Q4. Write Atomic Symbol of Thulium.
Q5. Write the Atomic number of Thulium.
Q6. On which block Thulium element is present?
Q7. What is the color of Thulium?
Q8. What is the Boiling point of Thulium?
Q9. What is the Melting point of Thulium?
Q10. Write the Isotopes of Thulium.
Q11. Show Electronic configuration of Thulium.
Q12. Write Electronic Structure of Thulium.
Q13. What is the Valency of Thulium?
Q14. Write the uses of Thulium element.