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प्रश्न
Complete the following statements :
Isotopes have different mass numbers because their nuclei contain different number of ............
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called .............
उत्तर
Isotopes have different mass numbers because their nuclei contain different number of neutrons.
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called isotopes.
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संबंधित प्रश्न
Give one example of a radioactive isotope which is used as a fuel in the reactors of nuclear power plants.
What name is given to those atoms which contain the same number of protons and electrons but different number of neutrons?
What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
Give one use each of the following radioactive isotopes :
(a) Uranium-235
(b) Cobalt-60
What is the reason for the different atomic masses of the isotopes of an element ?
Atom A has a mass number 209 and atomic number 82.
Atom B has a mass number 209 and atomic number 83.
(i) How many protons atom A has ?
(ii) How many protons atom B has ?
(iii) Are atoms A and B isotopes of the same element ?
Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass number of 35 and 37.
- What is meant by “atomic number of an element”? What do you understand by an ‘atom’
- Write down the electronic configuration of the chlorine atom.
- State the number of protons, electrons, and neutrons in the following isotopes: 35Cl17, 37Cl17
- Explain why the two atoms in (iii) above have the same chemical reactions.
- If molten magnesium chloride is electrolyzed suggest a suitable electrode [anode].
According to Dalton’s Atomic Theory, atoms of the same element are identical in all respects. But according to the Modern Atomic Theory, this postulate is proved wrong. Explain.
Among the following the odd pair is
U-235 Isotope is used as ______.
