Curium ( Cm ):

Define: Curium is inner transition metal place at 7th number in actinides series. It is radioactive element and rare earth metal. It is toxic in nature . It is expensive. It is formed by neutron bombardment on plutonium in nuclear reactor .

Discovery : it is discovered in 1944 by scientist Glenn seaborg and colleagues

Origin of name :The name curium is gives  in the honour of Pierre and Marie Curie

Physical properties :

Atomic symbol: Atomic symbol of curium is Cm

Atomic number : Atomic number of curium is 96

In curium 86 proton and 86 Electron is present

Atomic weight/ mass: atomic mass of curium is 247.07 Amu

In curium 96 proton and 157 neutron is present

Position : it is place in periodic table at 7th period and actinides series

Block: it is place in f block

Colour :curium show silvery colour

State : curium present in solid form

Boiling point : boiling point of curium is 3100 0C

Melting point :melting point of curium is 1345 0C


  • 244Cm: atomic weight of this isotope is 244.06 Amu

In this isotope 96 proton,96 electron and 148 neutron is present

  • 245Cm: atomic weight of this isotope is 245.05  Amu

In this isotope 96 proton, 96 electron and 149 neutron is present

  • 246Cm: atomic weight of this isotope is 246.06

In this isotope 96 proton 96 electron and 150 neutron is present

  • 247Cm: atomic weight of this isotope is 247.05 Amu

In this isotope 96 proton, 96 electron and 151 neutron is present

  • 248Cm: atomic weight of this isotope is 248.05 Amu

In this isotope 96 proton, 96 electron and 152 neutron is present

Chemical properties :

Electronic configuration

Electronic configuration of curium is [ Rn ] 5f7 6d 17s2

Electronic configuration in concert of shell is 2,8,18,32,25,9,2

Electronic structure

Valency : Valency of curium is 3

Atomic radius : radius of curium is 245 Pm


  • It is use to produce heat and energy
  • It is use as Alpha particles source in x ray spectrometer
  • It is provide power to electrical equipment used in space missions.


Question and Answer:

Q1. Define Curium

Q2. Who discovered Curium?

Q2. Physical properties of Curium

Q4. Write Atomic Symbol of Curium.

Q5. Write the Atomic number of Curium.

Q6. On which block Curium element is present?

Q7. What is the color of Curium?

Q8. What is the Boiling point of Curium?

Q9. What is the Melting point of Curium?

Q10. Write the Isotopes of Curium.

Q11. Show Electronic configuration of Curium.

Q12. Write Electronic Structure of Curium.

Q13. What is the Valency of Curium?

Q14. Write the uses of Curium element.

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