Question

Out of 0-16 and 0-18 isotopes which has more number of neutrons ​

Answer 1

0-18 beacuse both 0-16 and 0-18 have same atomic number that is they have same number of electrons and protons but as they have different mass number but same number of protons it means that there is differnce in number of neutrons as mass number is sum of neutrons and protons. So 0-18 has extra neutrons.

Answer 2

in the isotopes of oxygen O-18 has higher number of nuetrons

mass of O16 is 16 amu

=> number of protons + number of nuetrons = 16

=> no of nuetrons = 8

mass of O18 = 18 amu

=> no of proton + no of nuetrons = 18

=> no of nuetron = 10

so O - 18 has more number of nuetrons

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