Question

4 The composition of nuclei of two atomic species x a
are given below: [3]
Find the mass number of X and Y. State the relatior
between X and Y.
(ii) The K and L
shells of an atom
X
Y
are completely
P
Neutrons
electrons present
18
20
in it. State the
name of this element.​

Answer 1

Answer:

x in br and y is kr + 3 neutrons