Atomic Structure Quiz – Physics Questions and Answers

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Atomic Structure Quiz Questions and Answers

 

Atomic Structure Quiz Questions and Answers

 

Physics Atomic Structure Quiz Questions Part

Physics Quiz 1-10

1) Who first gave the concept of ‘Atom’?

Answer: Kanada.

2) How many times is the proton heavier than the electron?

Answer: 1836 times.

3) What is AMU?

Answer: It is the unit of atomic mass.

4) The energy released from the sun and the other stars is due to what?

Answer: Nuclear fusion.

5) The force that tends to make a nucleus fly apart?

Answer: Electrostatic repulsion.

6) Which force is responsible to keep the atomic nuclei together?

Answer: Nuclear force only.

7) How do the electrons move according to the Rutherford model of the atom?

Answer: Electrons orbit the positively charged nuclei.

8) What does the phenomenon of photo-electric emission establish?

Answer: The quantum nature of light.

9) When does the emission of energy take place?

Answer: An electron jumps from the higher orbit to the lower orbit.

10) What did Rutherford’s gold foil experiment prove?

Answer: Positively charged protons are contained in the nucleus of the atom.

 

Physics Atomic Structure Quiz Questions Part 2

Physics Quiz 11-20

11) What are Alpha particles?

Answer: Helium nucleus.

12) How does Alpha, Beta and Gama radiations come out of a radioactive substance?

Answer: spontaneously.

13) Where is installed the most powerful accelerator, the atom smasher?

Answer: Illinois, USA.

14) Where in India is cyclotron, the particle accelerator machine installed?

Answer: Kolkata.

15) X-rays consists of what?

Answer: Electromagnetic radiations.

16) What are cosmic rays?

Answer: High energy particles.

17) Who discovered positron?

Answer: Anderson.

18) What is ratio of the frequencies of the long wavelength limits of the Hyman and Balmer series of hydrogen?

Answer: 5:27

19) What is called the law of equivalence of mass and energy?

Answer: Einstein’s law.

20) What is known as, no two fermions can exist in identical quantum states?

Answer: Pauli Exclusion Principle.

 

Physics Atomic Structure Quiz Questions Part 3

Physics Quiz 21-30

21) What is called the Weinberg and Salam theory unifying electromagnetic forces and weak nuclear interaction?

Answer: Electroweak theory.

22) What is the name of the hypothetical theory that would unify all the fundamental forces of nature?

Answer: super grand unified theory.

23) What is called exchange of energy between one particles and an electromagnetic wave?

Answer: Interaction.

24) What does Frank-Hertz experiment establish?

Answer: The Frank-Hertz experiment establish that there are discrete energy levels in atoms.

25) In which regions of the spectrum, Hyman and balmer series lie?

Answer: They lie in ultraviolet and visible regions respectively.

26) In which regions of the spectrum, the Paschen series lies?

Answer: In ultraviolet and infra-red.

27) Who gave principle that “any given quantum orbit in an atom can be occupied by no more than two electrons”?

Answer: Pauli.

28) Who introduced the concept of electron spin?

Answer: Uhlenbeck and Goudsmit.

29) In which form is energy radiated from a source?

Answer: Photons.

30) What must we consider to explain fine structure of the spectrum of hydrogen atom?

Answer: Spin angular momentum.

 

Physics Atomic Structure Quiz Questions Part 4

Physics Quiz 31-40

31) For given value of n, what is the maximum number of electrons in an orbit?

Answer: 2n2

32) What is the speed of an electron in the orbit of hydrogen atom in the ground state?

Answer: C/137

34) Which is the best laboratory approximation to an ideal black body?

Answer: A hollow enclosure blackened inside with soot and having a small hole

35) From where fraunhofer, lines are observed in the spectrum?

Answer: The sun

36) Why is the fraunhofer lines present in the spectrum?

Answer: Vapors of elements present in atmosphere absorb certain colors

37) Write an example of sources that give discrete emission spectrum:

Answer: Mercury Vapor lamp

38) Which is the longest wavelength?

Answer: Infra-red radiation

39) Light from a distant star is examined with a spectroscope. What does the spectrum show?

Answer: Temperature of star

40) From where Band spectrum is obtained?

Answer: Molecules In the gaseous state of matter

 

Physics Atomic Structure Quiz Questions Part 5

Physics Quiz 41-51

41) Which type of spectra is produced in a candle flame, an electric bulb and a kerosene oil lamp?

Answer: Continuous spectra

42) In which color, wavelength of 5450 A0 occurs?

Answer: Green

43) What is the velocity of an electron in ground state?

Answer: 2 x 106m/s

44) The energy of an electron in the first orbit of hydrogen atom is -13.6 ev. What is the energy of the electron in the fourth orbit?

Answer: -0.85 ev.

45) What do you mean by trajectory of scattered ∞ particles?

Answer: Hyperbole.

46) What is called an electron’s movement around the nucleus in circular orbits?

Answer: Stationary orbits.

47) What is the total energy of an electron in atom?

Answer: It is always negative.

48) Which source is associated with a line emission spectrum?

Answer: Neon street sign.

49) What is the electronic configuration of noble gas?

Answer: 1s2, 2s2, 1p6

50) Hydrogen atoms are excited from ground state of principal quantum number 4. How many number of spectral lines are observed?

Answer: 6.

51) Hydrogen atom emits blue light when it changes from n=4 energy level to n=2 level. Which colour would the atom emit when it changes from n=5 level to n=2 level?

Answer: Green.

 

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