Dubnium ( Db ) :
Define: Dubnium Is transectinides metal. It is place below Tantalum . It is man made element. It is a transuranic element. It is produce artificially by bombarding californium 249 isotopes with nitrogen 15 . It is toxic in nature due to radioactivity.
Discovery : it is discovered in 1970 by scientist Berkeley and Dubna .
Origin of name : the name gives form the Russian town Dubna
Physical properties :
Atomic symbol: Atomic symbol of Dubnium is Db
Atomic number : Atomic number of Dubnium is 105
In Dubnium 105 proton and 105 electron is present
Atomic weight/ mass: Atomic weight of Dubnium is 268 Amu
In Dubnium 105 proton and 153 neutron is present
Position : it is place in periodic table at 7th period and 5th group
Block : it is place in d block
Colour : Dubnium show silver colour
State : Dubnium present in solid form
Boiling point :Boiling point of Dubnium is unknown
Melting point :melting point of Dubnium is unknown
- 263Db: Atomic weight of this isotope is 263.05
In this isotope 105 proton ,105 electron and 158 neuron is present
- 267Db: Atomic weight of this isotope is 268.04 Amu
In this isotope 105 proton ,105 electron and 162 neutron is present
- 268Db: atomic weight of this isotope is 268.05 Amu
In this isotope 105 proton ,105 electron and 163 neutron is present
- 270Db: atomic weight of this isotope is 270.06 Amu
In this isotope 105 proton ,105 electron and 165 neutron is present
Chemical properties :
Electronic configuration of Dubnium is [ Rn ] 5f14 6d3 7s2
Electronic configuration in concert of shell is 2 ,8,18,32,32 11,2
Valency :valency of Dubnium is 5
Atomic radius : Atomic radius of Dubnium is 139 pm
- it is use only in research field
Question and Answer:
Q1. Define Dubnium
Q2. Who discovered Dubnium?
Q2. Physical properties of Dubnium
Q4. Write Atomic Symbol of Dubnium.
Q5. Write the Atomic number of Dubnium.
Q6. On which block Dubnium element is present?
Q7. What is the color of Dubnium?
Q8. What is the Boiling point of Dubnium?
Q9. What is the Melting point of Dubnium?
Q10. Write the Isotopes of Dubnium.
Q11. Show Electronic configuration of Dubnium.
Q12. Write Electronic Structure of Dubnium.
Q13. What is the Valency of Dubnium?
Q14. Write the uses of Dubnium element.