HSC Science (General) 12th Board ExamMaharashtra State Board
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Calculate Ionisation Energy for this Atom, If the Ground State Energy is -13.6 Ev - HSC Science (General) 12th Board Exam - Physics

Question

An electron is orbiting in 5th Bohr orbit. Calculate ionisation energy for this atom, if the ground state energy is -13.6 eV.

Solution

Ground state energy E1 = −13.6 eV

E5 = ?

Energy of electron in Bohr’s orbit is inversely proportional to the square of the principal quantum number.

therefore"E"_5/"E"_1="n"_1^2/"n"_5^2

therefore"E"_5/"E"_1=1^2/5^2

therefore"E"_5=(-13.6)/25=-0.544"eV"

The ionization energy = E - E5 = 0 − (−0.544) = 0.544 eV

Hence, the ionization energy in the 5th orbit is 0.544 eV.

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2014-2015 (March) (with solutions)
Question 6.8 | 2.00 marks

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Solution Calculate Ionisation Energy for this Atom, If the Ground State Energy is -13.6 Ev Concept: Bohr'S Model for Hydrogen Atom.
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