energy required for the electron excitation in textltexti

Energy required for the electron excitation in $$L{i^{ + + }}$$ from the first to the third Bohr orbit is :

A. $$36.3\,eV$$

B. $$108.8\,eV$$

C. $$122.4\,eV$$

D. $$12.1\,eV$$

Answer : $$108.8\,eV$$

Solution :
Energy of excitation,
$$\eqalign{ & \Delta E = 13.6{Z^2}\left( {\frac{1}{{n_1^2}} - \frac{1}{{n_2^2}}} \right)eV \cr & \Rightarrow \Delta E = 13.6{\left( 3 \right)^2}\left( {\frac{1}{{{1^2}}} - \frac{1}{{{3^2}}}} \right) = 108.8\,eV \cr} $$

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Modern Physics >> Atoms And Nuclei

Releted Question 1

If elements with principal quantum number $$n > 4$$ were not allowed in nature, the number of possible elements would be

A. 60

B. 32

C. 4

D. 64

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Releted Question 2

Consider the spectral line resulting from the transition $$n = 2 \to n = 1$$ in the atoms and ions given below. The shortest wavelength is produced by

A. Hydrogen atom

B. Deuterium atom

C. Singly ionized Helium

D. Doubly ionised Lithium

View Answer

Releted Question 3

An energy of $$24.6\,eV$$ is required to remove one of the electrons from a neutral helium atom. The energy in $$\left( {eV} \right)$$ required to remove both the electrons from a neutral helium atom is

A. 38.2

B. 49.2

C. 51.8

D. 79.0

View Answer

Releted Question 4

As per Bohr model, the minimum energy (in $$eV$$ ) required to remove an electron from the ground state of doubly ionized $$Li$$ atom $$\left( {Z = 3} \right)$$ is

A. 1.51

B. 13.6

C. 40.8

D. 122.4

View Answer

Energy required for the electron excitation in $$L{i^{ + + }}$$ from the first to the third Bohr orbit is :

Releted MCQ Question on
Modern Physics >> Atoms And Nuclei

If elements with principal quantum number $$n > 4$$ were not allowed in nature, the number of possible elements would be

Consider the spectral line resulting from the transition $$n = 2 \to n = 1$$ in the atoms and ions given below. The shortest wavelength is produced by

An energy of $$24.6\,eV$$ is required to remove one of the electrons from a neutral helium atom. The energy in $$\left( {eV} \right)$$ required to remove both the electrons from a neutral helium atom is

As per Bohr model, the minimum energy (in $$eV$$ ) required to remove an electron from the ground state of doubly ionized $$Li$$ atom $$\left( {Z = 3} \right)$$ is

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Atoms And Nuclei

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Energy required for the electron excitation in $$L{i^{ + + }}$$ from the first to the third Bohr orbit is :

Releted MCQ Question on Modern Physics >> Atoms And Nuclei

If elements with principal quantum number $$n > 4$$ were not allowed in nature, the number of possible elements would be

Consider the spectral line resulting from the transition $$n = 2 \to n = 1$$ in the atoms and ions given below. The shortest wavelength is produced by

An energy of $$24.6\,eV$$ is required to remove one of the electrons from a neutral helium atom. The energy in $$\left( {eV} \right)$$ required to remove both the electrons from a neutral helium atom is

As per Bohr model, the minimum energy (in $$eV$$ ) required to remove an electron from the ground state of doubly ionized $$Li$$ atom $$\left( {Z = 3} \right)$$ is

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