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प्रश्न
What name is given to those atoms which contain the same number of protons and electrons but different number of neutrons?
उत्तर
Atoms which contain the same number of protons and electrons, but different number of neutrons are known as isotopes of an element.
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संबंधित प्रश्न
What name is given to the pair of atoms such as `""_7^14"N"` and `""_7^15"N"` ?
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 ?
Which of the following pairs are isotopes ? Give reasons for your choice :
(i) `""_26^58"A"`, `""_28^58"B"` or (ii) `""_35^79"X"`, `""_35^80"Y"`
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.
Four elements A, B, C, D are given :
- A shows the presence of 20 neutrons, 17 protons and 17 electrons.
- B shows the presence of 18 neutrons, 17 protons and 17 electrons.
- C shows the presence of 10 neutrons, 9 protons and 10 electrons.
- D shows the presence of 4 neutrons, 3 protons and 2 electrons.
State which of the above is –
- an anion
- a cation
- a pair of isotopes.
Write the formula of the compound formed between D and C.
The isotope was used to remove the brain tumor and treatment of Cancer in ______.
Explain radioactive decay and radioactive isotopes.
Distinguish isotopes from isobar.
