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प्रश्न
The mass number of two atoms X and Y is the same (40 each) but their atomic number are different (being 20 and 18 respectively). X and Y are examples of :
विकल्प
chemically similar atoms
isotopes
solid and liquid metals
isobars
MCQ
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उत्तर
Isobars
Isobars are the atoms of different elements with same mass number but different atomic numbers.
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