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प्रश्न
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.
उत्तर
According to modern atomic theory atoms of the same element may not be alike in all respect.
e.g. isotopes of chlorine 3517 Cl and 3717 Cl have different atomic masses 35 and 37. This proves Dalton’s Atomic Theory wrong.
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संबंधित प्रश्न
Isotopes of an element have ______.
Fill in the blanks of the following statement :
An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ___________.
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Radioactive isotope of iodine is used for making the medicine called tincture iodine.
Explain why, the atomic masses of many elements are in fractions and not whole numbers.
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"`
Select the correct answer from the answer in the bracket to complete the sentence.
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Name or state the following.
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List the uses of isotopes.
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