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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 smallest unit of an element which takes part in a chemical reaction.
What are the two main parts of which an atom is made of?
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
WRITE SHORT ANSWER
Name the isotopes of hydrogen.
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
Draw the electronic configuration of the following elements clearly stating the number of neutrons and protons in their nucleus.
a. Beryllium b. Silicon
c. Chlorine d. Aluminium
e. Nitrogen
Name the negatively charged particle present in the atoms of all the elements.
Compare a proton and a neutron in respect of mass and charge.
Define the term Mass number.
Draw a neat labelled diagram representing an atom. Name the three sub-atomic particles in the atom and represent them symbolically showing the mass and charge of each. State where the sub-atomic particles are present in the atom.
