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प्रश्न
How does the existence of isotopes contradict Dalton’s atomic theory?
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उत्तर
- Atoms are not indivisible, they can be further divided into fundamental particles electrons, protons and neutrons.
- Every atom of an element is not identical. Isotopes are the atoms of same element with same atomic number but different mass number, that means they have same number of protons and electrons but differ in their number of neutrons.
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संबंधित प्रश्न
Fill in the blank
The ..........................of an atom is very hard and dense.
Complete the table below by identifying A, B, C, D, E and F.
FILL IN THE BLANK
Amount of energy stored inside the ..................... is known as nuclear energy.
TRUE \ FALSE
Uranium-235 and uranium-238 both undergo nuclear fission.
ANSWER IN DETAIL
How are radioactive radiations useful in medicines ?
On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?
Which metal did rutherford select for his `alpha` particle scattering experiment and why?
Name the following:
The element which does not contain any neutron in its nucleus.
What is meant by the term nucleus
Differentiate between the following term:
Nucleus and nucleons
