Question

Number of protons, neutrons and electrons in four species a,b,x,y are respectively 6,6,6; 7,7,7,6,8,6 and 9,10,10. give symbolic representation of each species and tell which of them are isotopes and which are isobars?

Answer 1

the correct answer for this question is this

Answer 2

Answer:

Isotopes are 'A' & 'X'.

Isobars are 'B' and 'X'

Explanation:

Lets see the data in a tabular form:-

          P  N  E

   a     6  6  6

   b    7  7  7

   x    6  8  6

   y    9  10  10

For A:- At. no = 6  &  mass no= 6+6=12

For B:- At. no = 7  &  mass no=7+7=14

For X:- At. no = 6  &  mass no=6+8=14

For Y:- At. no = 9  &  mass no=9+10=19

Isotopes are the elements having same At. no,but different mass no.

Here Isotopes are A and X

Isobard are the elements having different At. no, but same mass no.

Here Isobars are B and X