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Why is an electron called universal part...

Why is an electron called universal particle?

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Its mass and charge are independennt of its source.
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CHHAYA PUBLICATION-STRUCTURE OF ATOM-QUESTION ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
  1. Name the anode ray particle with highest (e)/(m) value.

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  2. What is the consequence when cathode rays strike a hard metal surface ...

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  3. Why is an electron called universal particle?

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  4. What is the value of fundamental unit of electrocity?

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  5. Besides electron proton and neutron, name two other subatomic particle...

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  6. A cation M^(3+) has 23 electrons. Find the atomic no. of M.

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  7. Bohr's theory is not applicable to which of the following species? (1)...

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  8. Balmer series of hydrogen spectrum lies in which region?

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  9. Mention the most important application of de-Broglie concept.

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  10. how are frequency and wave number of electromagnetic radiation related...

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  11. A electron beam after passing through a thin foil of gold produces a d...

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  12. What is a quantum?

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  13. What happens when an electron hits a zinc sulphide screen and what doe...

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  14. Write an expression for the wavelength acquired by an electron acceler...

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  15. Out of X-rays, gamma-rays and microwaves which one has the highest and...

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  16. What is the unit of Planck's constant in S.I. ? What other physical qu...

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  17. Arrange the given subshells in the increasing order of their energies:...

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  18. What is the main difference between wave emitted by an electric bulb a...

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  19. Do atomic orbitals have sharp boundaries?

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  20. At what distance from the nucleus is the radial probability maximum fo...

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