what is the relationship between two elements X and Y whose atomic number are 18 and 20 respectively but their mass number remains same as 40?
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11
They are isobars that is they have different atomic numbers but same mass numbers.
In this case, X is Argon and Y is Calcium.
In this case, X is Argon and Y is Calcium.
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3
They are isobars. Isobars are elements with same mass number but different atomic number.
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