Krypton :
Krypton is Nobel gas . It is found is trace amount . It is called rare gas it is found by distillation process .Krypton is non toxic in nature.
It give inert atmosphere in chemical reaction.
It is very heavy gas and show diamagnetic nature .
Discovery : Krypton is discovered in 1898 by scientist air William Travers .
Origin of name :. The name is given to the element from Greek word ‘ kryptos’ meaning of this word is hidden .
Physical properties :
Atomic symbol: Krypton is denoted by the symbol Kr
Atomic number : atomic number of Krypton is 36
Atomic weight/ mass: atomic mass of Krypton is 83.8 Amu
Position : it is place in periodic table at 4th row( period) and 18thcolumn ( group)
Block : it is place in P block
Outermost shell electron place in p block
Colour : Krypton is colourless gas
Odour : it is odourless gas
Taste : Krypton show no taste
Boiling point :Boiling point of Krypton is – 153 0C
Melting point : melting point of water is –1570 C
Isotopes:
Krypton show 6 stable isotope
78Kr:. Atomic weight this isotope is 77.9 Amu
In this isotope 36 proton, 36 electron and 42 neutron is present
It is present 0.35%
80Kr: atomic weight of this isotope is 79.9 Amu
In this isotope 36 proton, 36electron and 44 neutron is present
It is present 11.5% in nature
82Kr: atomic weight of this isotope is 81.9 Amu
In this isotope 36 proton, 36 electron, 46 neutron is present
It is present 11.5% in nature
83Kr: atomic weight of this isotope is 82.9 Amu
In this isotope 36 proton,36 electron and 47 neutron is present
It is present 11.5% in nature
84Kr: atomic weight of this isotope is 83.9 Amu
In this isotope 36 proton,36 electron and 48 neutron is present
It is present 56.9% in nature
86Kr: atomic weight of this isotope is 85.9 Amu
In this isotope 36 proton,36 electron And 50 neutron is present
It is present 17.2% in nature.
Chemical properties :
Electronic configuration
Electronic configuration of Krypton is [Ar] 3d10 4S2 4P6
Electronic configuration in concert of shell is 2,8,18,8
Electronic structure
Valency :Velency of Krypton is o
No valence or unpaired electron present in outer shell
Atomic radius : atomic radius of Krypton is 88 pm
Reactivity : no reaction occurs with Krypton only fluorine gas react with Krypton
Uses:
Krypton gas use in flash lamp
It is use in high speed photography .
Radio active isotope of Krypton is also use in medicine for the detection of heart opening
It is use in laser light –. Green colour laser formed
It is use in MRI technique
Krypton laser used in nuclear fusion reaction .
It is also used as filler gas in fluorescent light
Question and Answer:
Q1. Define Krypton
Q2. Who discovered Krypton?
Q2. Physical properties of Krypton
Q4. Write Atomic Symbol of Krypton.
Q5. Write the Atomic number of Krypton.
Q6. On which block Krypton element is present?
Q7. What is the color of Krypton?
Q8. What is the Boiling point of Krypton?
Q9. What is the Melting point of Krypton?
Q10. Write the Isotopes of Krypton.
Q11. Show Electronic configuration of Krypton.
Q12. Write Electronic Structure of Krypton.
Q13. What is the Valency of Krypton?
Q14. Write the uses of Krypton element.
