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How much energy is required to ionise a H atom if the electron occupie...

How much energy is required to ionise a | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

Question:

How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your answer with the ionization enthalpy of H atom (energy required to remove the electron from n =1 orbit).

Answer:

The expression of energy is given by,

Where,

Z = atomic number of the atom

n = principal quantum number

For ionization from n1 = 5 to ,

Therefore ΔE = E2- E1 = - 21.8 X10^-19 (1/n₂²-1/n₁²)

= 21.8 X10^-19(1/n₂²-1/n₁²)

= 21.8 X10^-19 (1/5²-1/∞)

= 8.72 x 10^-20 J

For ionization from 1^st orbit, n₁= 1,

Therefore ΔE’ = 21.8x10^-19(1/1²-1/∞)

= 21.8x10^-19J

Now ΔE’/ ΔE = 21.8x10^-19 / 8.72x10^-20 = 25

Thus the energy required to remove electron from 1^st orbit is 25 times than the required to electron from 5^th orbit.

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Comments

Shubham shriwas
2019-08-20 22:13:14

Mast wala answer dene ke liye thanks sir

Sujal Rajput
2019-08-12 15:58:19

What the hell

Kritika
2019-08-12 11:19:31

Thanks

Krishnendu
2019-08-01 21:28:05

Such a worst answer I have ever seen

Krishnendu
2019-08-01 21:04:40

How at first n2=infinity

Iswarya
2019-07-07 21:27:47

Grammatical mistake

Iswarya
2019-07-07 21:15:25

Thanks ,any how good

Iswarya
2019-07-07 21:14:16

Typing must be clear

Liana
2019-07-07 19:02:25

I think some steps are missing

Peeku
2019-07-04 21:03:45

Thank u sir

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Welcome to the NCERT Solutions for Class 11 Chemistry - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 14: How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your an....

How much energy is required to ionise a | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

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