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According to Bohr's model of hydrogen atom, the electric current generated due to motion of electron in $n^{th}$ orbit is:

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Important Questions on Structure of Atom

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 106

An electron in a hydrogen like atom makes transition from a state in which its de-Broglie wavelength is

λ_{1}

to a state where its de-Broglie wavelength is

λ_{2}

, then the wavelength of the photon

(λ)

generated will be? (

m

is mass of electron,

c

is speed of light in vacuum)

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 114

There are two samples of

H

and

{He}^{+}

atom. Both are in some excited state. In hydrogen atom total number of lines observed in Balmer series is

4

and in

{He}^{+}

atom total number of lines observed in paschen series is

1

. Electron in hydrogen sample make transitions to lower states from its excited state, then the photon corresponding to the line of maximum energy line of Balmer series of

H

sample is used to further excite the already excited

{He}^{+}

sample. Then maximum excitation level of

{He}^{+}

sample will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 117

In a sample of hydrogen atom in ground state electrons make transition from ground state to a particular excited state where path length is five times to de-Broglie wavelength, electrons make back transition to the ground state producing all possible photons. If photon having

2^{nd}

highest energy of this sample can be used to excite the electron in a particular excited state of

{Li}^{2 +}

atom then find the final excited state of

{Li}^{2 +}

atom.

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 119

If each orbital can hold a maximum of

3

electrons, the number of elements in

4^{th}

periodic table (long form) is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 120

In all how many nodal planes are there in the atomic orbitals for the principal quantum number

n = 3

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 121

{}_{90}^{234}{Th}

disintegrates to give

{}_{82}^{206}{Pb}

as the final product. How many alpha and beta particles are emitted during this process? Express answer as number of

α

-particles

+

number of

β

-particle emitted.

HARD

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 122

Which is true about an electron?

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-4>Q 123

Many elements have non-integral atomic masses because:

According to Bohr's model of hydrogen atom, the electric current generated due to motion of electron in nth orbit is:

Important Questions on Structure of Atom

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According to Bohr's model of hydrogen atom, the electric current generated due to motion of electron in $n^{th}$ orbit is: