Question

A and B Tre tivo elements which have
Same atomic weight and the having atomic
number 27 and 30 respectively. If the
refomic weight of A is 57 then number of
neufeon is B is :​

Answer 1

Answer:

a and b weight is same .atomic weight=no of protons +no of neutron.

now , a atomic no is 27

b atomic no is 30

given atomic weight of a is 57 , so atomic weight of b is 57.

now, no of neutron in b is atomic weight of b -atomic no of b, so 57-30=27 and