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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
Write true or false for the following statement
The central pad of the atom is called nucleus.
Multiple Choice Questions
number of valence electrons present in magnesium is
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.
TRUE \ FALSE
Electrons are present in the nucleus.
Compare a proton and a neutron in respect of mass and charge.
The particle not present in an ordinary hydrogen atom is :
Which of the following statement is always correct?
State its one drawback of Rutherford’s atomic model.
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
