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How does mass number differ from atomic ...

How does mass number differ from atomic mass?

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Atomic mass is the average of the atomic masses of the isotopes of the element, on the basis of their natural abundance. It can have a fractional value but mass no. (=n+p) is always a whole number.
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CHHAYA PUBLICATION-STRUCTURE OF ATOM-EXERCISE (SHORT TYPE QUESTIONS)
  1. How did Rutherford arrive at the conclusion that the volume occupied b...

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  2. What is mass number? How is it related to atomic number?

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  3. How does mass number differ from atomic mass?

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  4. Indicate the number of electrons, protons and neutrons present in ""(9...

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  5. Frequency of a photon is 1.2xx10^(15)Hz. Calculate its energy in J.

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  6. Write three differences between rugherford's atomic model and Bohr's a...

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  7. Calculate the wavelength of the spectral line having minimum energy in...

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  8. The total energy of an electron in an atom is negative'-what does it s...

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  9. The number of electrons in K, L and M-shell of an atom are 2.8 and 5 r...

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  10. Indicate one application of wave property of electron.

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  11. Heisenberg's uncertainty principle is not applicable to particles havi...

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  12. Write Schrondinger's wave equation and indicate the significance of di...

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  13. Half-filled and fully filled orbitals have extra stability. Explain.

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  14. Copper(I) is diamagnetic but copper(II) is paramagnetic-why?

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  15. An element has the electronic configuration [Ar]3d^(4) at its +3 oxida...

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  16. Calculate the numbe of unpaired electrons in Pd(Z=46).

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  17. Show that the third shell may contain a maximum of 18 electrons.

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  18. Is there any existence of 3f-subshell in any atom?

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  19. How many electrons in the Cl-atom at the most can have value, n+l=3?

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  20. Between Cu^(2+) and Fe^(2+), which one is more paramagnetic?

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