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प्रश्न
Distinguish between isotopes and isobars.
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उत्तर
| Isotopes | Isobars |
| Isotopes are atoms of the same element. | Isobars are atoms of different elements. |
| They have the same atomic number. | They have different atomic numbers. |
| They have the different mass number. | They have the same mass number. |
| Numbers of protons are same in isotopes. | Numbers of protons are different in isobars. |
संबंधित प्रश्न
In a periodic table the average atomic mass of magnesium is given as 24.312 u. The average value is based on their relative natural abundance on earth. The three isotopes and their masses are `""_12^24Mg` (23.98504u), `""_12^25 Mg` (24.98584u) and `""_12^26Mg` (25.98259u). The natural abundance of `""_12^24 Mg` is 78.99% by mass. Calculate the abundances of other two isotopes.
Name a material which is used in making control rods in a nuclear reactor.
If neutrons exert only attractive force, why don't we have a nucleus containing neutrons alone?
The mass number of a nucleus is
The atomic mass of Uranium `""_92^238"U"` is 238.0508 u, while that of Thorium `""_90^234"Th"` is 234.0436u, and that of Helium `""_2^4"He"` "is 4.0026u. Alpha decay converts `""_92^238"U"` into `""_92^234"Th"` as, shown below:
`""_92^238"U" -> ( ""_90^234"Th" + ""_2^4"He" + "Energy" )`
Find the Q-value and the kinetic energy of the emitted α-particle in the α-decay of `""_86^220"Rn"`.
Given `"m"(""_88^226"Ra")` = 226.02540 u, `"m"(""_86^222 "Rn")` = 222.01750 u,
`"m"(""_86^220 "Rn")`= 220.01137 u, `"m"(""_84^216 "Po")`= 216.00189 u.
Nuclear species or nuclides are shown by the notation ________ where X is the chemical symbol of the species.
Two nuclei have different mass numbers A1 and A2. Are these nuclei necessarily the isotopes of the same element? Explain.
James Chadwick, in 1932 studied the emission of neutral radiations when Beryllium nuclei were bombarded with alpha particles. He concluded that emitted radiations were neutrons and not photons. Explain.
1 amu is defined as:
