Radium ( Ra )
Define: Radium is alkaline earth metal . Place at 6th number in alkaline metal series. It is radioactive element which is shiny ,toxic and soft in nature. It is found as by product in uranium mineral refining
Discovery : it is discovered in 1898 by scientist Pierre and Marie Curie
Origin of name : the name is derived from Latin word ‘ radius ‘ meaning of this word is ray
Physical properties :
Atomic symbol: Atomic symbol of Radium is Rn
Atomic number : Atomic number of radium is 88
In radium 88 proton and 88 Electron is present
Atomic weight/ mass: Atomic weight of radium is 226.03 Amu
In radium 88 proton and 138 neutron is present
Position : it is place in periodic table at 2nd column ( group ) and 7th period ( row )
Block : it is place in s block
Colour : Radium show silvery white colour
State : Radium present in solid state
Boiling point : Boiling point of Radium is 1500 0C
Melting point :melting point of Radium is 690 0C
Isotopes: Radium show 4 stable isotopes
- 223Rn: atomic weight of this isotope is 223.01 Amu
In this isotope 88 proton ,88 electron and 135 neutron is present
- 224Rn : atomic weight of this isotope is 224.02 Amu
In this isotope 88 proton, 88 electron and 136 neutron is present
- 226Rn: Atomic weight of this isotope is 225.02 Amu
In this isotope 88 proton, 88 electron and 138 neutron is present
- 228Rn: Atomic weight of this isotope is 228.03 Amu
In this isotope 88 proton, 88 electron and 140 neutron is present
Chemical properties :
Electronic configuration of radium is [ RN ] 7s2
Electronic configuration in concert of shell is 2,8,18,32,18,8,2
Valency : Valency of radium is 2
Atomic radius : Atomic Radius of radium is 283 Pm
- Radium 223 Isotope is use to treat prostate cancer.
- It is use to make aircraft instrument dials
- It is use to produce neutron sources
- Radium is use in luminous paints and watch dials
- It is use in products like toothpaste and chocolate .
Question and Answer:
Q1. Define Radium
Q2. Who discovered Radium?
Q2. Physical properties of Radium
Q4. Write Atomic Symbol of Radium.
Q5. Write the Atomic number of Radium.
Q6. On which block Radium element is present?
Q7. What is the color of Radium?
Q8. What is the Boiling point of Radium?
Q9. What is the Melting point of Radium?
Q10. Write the Isotopes of Radium.
Q11. Show Electronic configuration of Radium.
Q12. Write Electronic Structure of Radium.
Q13. What is the Valency of Radium?
Q14. Write the uses of Radium element.