Question

Please solve this question of chemistry chapter 4

Answer 1

FOR X

mass no. = protons + neutrons                atomic no. = protons = 11

               = 11 + 13

              = 24

FOR Y  

mass no. = 12 + 12                                    atomic no. = 12

              = 24

relation :- element both have same mass no. so they are isobar

Answer 2

The atomic mass number of x is 11+13(number of protons+number of neutrons)=24

the atomic mass number of y is 12+12=24

the atomic number of x is 11 and y is 12 (atomic number can be calculated by number of protons or electrons

the relation ship between them is Isobars