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The energy of the lowest level of a hydrogen atom is $- 13.6 eV .$ The energy of the photon emitted in the transition from $n = 3$ to $n = 1$ is

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Important Questions on Atoms, Molecules and Nuclei

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 57

The ionisation potential of the hydrogen atom is

13.6 eV .

Hydrogen atom in the ground state is excited by monochromatic radiation of photon energy

12.1 eV

. The number of spectral lines emitted by hydrogen atoms according to Bohr's theory will be

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 58

If in nature there may not be an element for which the principal quantum number

n > 4

, then the total possible number of elements will be

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 59

If the binding energy per nucleon of deuteron is

1.115 MeV

. Its mass defect in atomic mass unit is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 60

Two samples

X

and

Y

contain equal amounts of radioactive substances. If

\frac{1}{16}

th of the sample

X

and

\frac{1}{256}

th of the sample

Y

remain after

8

hours, then the ratio of half-periods of

X

and

Y

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 62

Assertion: Natural radioactive nuclei are nuclei of high mass number.

Reason: The B.E. per nucleon of heavy nuclei is large as compared to that of the stable nuclei.

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Critical Thinking>Q 64

Rutherford assumed in his atomic model that

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 1

Rutherford's.

α

-particle experiment showed that the atoms have

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 2

Rutherford's

α

-particle experiment showed that the atoms have

The energy of the lowest level of a hydrogen atom is -13.6 eV. The energy of the photon emitted in the transition from n=3 to n=1 is

Important Questions on Atoms, Molecules and Nuclei

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The energy of the lowest level of a hydrogen atom is $- 13.6 eV .$ The energy of the photon emitted in the transition from $n = 3$ to $n = 1$ is