Problem 84a

Given information

The diagram represents  atoms of the element known as westmontium ( ). It is also a fictitious element.

Step-by-step explanation

Isotopes consist of a different number of neutrons and a same number of protons.

Here the green sphere represents  , blue sphere show  and red one represents  .

counting all the spheres as per the color we get

blue -  

green -    

red -