Radium

Radium ( Ra ) 

Define: Radium is alkaline earth metal . Place at 6^th 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 2^nd column ( group ) and 7^th 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

Electronic configuration of radium is [ RN ] 7s²

Electronic configuration in concert of shell is 2,8,18,32,18,8,2

Electronic structure

Valency : Valency of radium is 2

Atomic radius : Atomic Radius of radium is 283 Pm

Uses:

• 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.