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प्रश्न
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
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उत्तर
Relative masses :relative mass of a neutron is 1u, that of a proton is also 1u and that of an electron is (1/1840) u.
Charge: Charge of a proton is +1, that of an electron is –1 and that of a neutron is zero.
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संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
Multiple Choice Questions
The outermost shell of an atom is known as
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
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.
WRITE SHORT ANSWER
What is an atom?
Name the sub-atomic particle whose charge is 0.
Name the three fundamental particles of an atom.
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
