Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 6

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Frequency of revolution of an electron revolving in n^th orbit of H-atom is proportional to

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Important Questions on Atoms and Nuclei

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 7

Two nucleons are at a separation of

1 \times 10^{- 15} m

. The net force(nuclear) between them is

F_{1}

if both are neutrons,

F_{2}

if both are protons and

F_{3}

if one is a proton and other is a neutron. In such a case,

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 8

The ratio of the longest to the shortest wavelengths in the Bracket series of hydrogen spectra is

\frac{P}{18}

. Then, the value of

P

is:

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 9

The first member of the Balmer series of hydroge

n

atom has a wavelength of

6561 Å .

The wavelength of the second member of the Balmer series (in

nm

) is .....

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 10

In the figure, six lines of emission spectrum are shown. Which of them will be absent in the absorption spectrum?

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 11

Which of the series of hydrogen atom spectrum lies in the visible region of electromagnetic spectrum?

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 12

One of the lines in the emission spectrum of

L i^{2 +}

has the same wavelength as that of the

2^{nd}

line of Balmer series in hydrogen spectrum. The electronic transition corresponding to this line is:

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 13

The Hitomi satellite recently observed the Lyman alpha emission line

(n = 2 to n = 1)

of Hydrogen-like iron ion (atomic number of iron is

26

) from the Perseus galaxy cluster. The wavelength of the line is closest to,

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Physics Crash Course JEE Main>Chapter 21 - Atoms and Nuclei>Level 1>Q 14

Out of following spectral series of the Hydrogen spectrum, the one which lies wholly in the ultraviolet region is