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प्रश्न
Compare an electron and a proton in respect of mass and charge.
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उत्तर
The relative mass of a proton is 1u, as the mass of the proton is almost same as that of a hydrogen atom. The relative mass of an electron is (1/1840) u, as the mass of an electron is 1/1840th of the mass of a hydrogen atom.
A proton is positively charged, whereas an electron is negatively charged.
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संबंधित प्रश्न
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
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?
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.
WRITE SHORT ANSWER
What is the charge on a neutron ?
ANSWER IN DETAIL
What is the maximum number of electrons that L shell can accommodate ? Give reasons for your answer.
State whether the following statement is true or false :
The anode rays obtained from all the gases consist of positively charged particles called protons.
State the location of electrons, protons and neutrons in an atom.
Define the term Mass number.
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
