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प्रश्न
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
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उत्तर
The fundamental particles of the atom are: electrons, protons and neutrons.
| Particle | Symbol | Charge |
| electron | e– | -1 or 1.602 x 10-19 C. Where -1 represent its one unit negative electrical charge |
| proton | p+ | + 1 or 1.602 x 10-19 C. Where +1 represents one unit +ve electrical charge. |
| neutron | no | 0 |
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संबंधित प्रश्न
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
Multiple Choice Questions
number of valence electrons present in magnesium is
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
- 1.6 x 10-19 C
- 1.6 x 10-15 C
- 1.4 x 10-19 C
- 1.6 x 19-16 C.
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
Name the negatively charged particle present in the atoms of all the elements.
Compare an electron and a proton in respect of mass and charge.
Compare a proton and a neutron in respect of mass and charge.
What is meant by the term subatomic particles?
