Pls tell how to solve this question ASAP thankyou
Solution:
For atom X,
Atomic Number = No, of protons = 17
Mass Number = No, of protons+neutrons = 17+18 = 35
For atom Y,
Atomic Number = No, of protons = 17
Mass Number = No, of protons+neutrons = 17+20 = 37
Since the atomic number is same but the mass number is different, then X and Y are isotopes.
For atom X,
Atomic Number = No, of protons = 17
Mass Number = No, of protons+neutrons = 17+18 = 35
For atom Y,
Atomic Number = No, of protons = 17
Mass Number = No, of protons+neutrons = 17+20 = 37
Since the atomic number is same but the mass number is different, then X and Y are isotopes.