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Mass number is equal to the ....

Mass number is equal to the _______.

A

Number of protons + number of electrons

B

Number of neutrons + number of electrons

C

Number of neutrons + number of electrons

D

Number of electrons

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The correct Answer is:
B
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SURA PUBLICATION-QUANTUM MECHANICAL MODEL OF ATOM-ADDITIONAL QUESTIONS - CHOOSE THE CORRECT ANSWER
  1. Which is the lightest among the following?

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  2. The atomic number of an element is 17 and its mass number is 37. The...

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  3. Mass number is equal to the .

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  4. The radius of nucleus is approximately times smaller than the radius o...

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  5. Name the element whose isotope has mass number 14 and 8 neutrons.

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  6. The charge to mass ratio of electron was found to be

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  7. When alpha- rays strike a thin gold foil then,

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  8. Isotopes have

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  9. .(6)C^(14) and .(7)N^(14) are

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  10. Which of the following conclusions could not be derived from Rutherfor...

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  11. If E(n) = -313.6//n2, if the value of E1 = -34.84 to which value 'n' c...

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  12. Which of the following about the electron is incorrect?

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  13. Which of the following properties of atom could be explained correctly...

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  14. In which of the following pairs, the ions are isoelectronic? Na^(+)...

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  15. Assertion (A) : Isotopes of a given element show the same type of chem...

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  16. The electrons identified by quantum numbers n and l (i) n = 4, l = ...

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  17. Dual character of an electron was explained by

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  18. de-Broglie equation is

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  19. The value of Bohr radius for hydrogen atom is

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  20. Which of the following particle having same kinetic energy, would have...

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