Trick to find mass number of elements with all the exceptions | Atomic number and mass number

Chemistry

tricks

trick to find mass number

class11

class 9

What is mass number

chemistry class 9

chemistry class 11

easy tricks

jee mains

neet

exam

important question

Mass number

exceptions

all the exceptions

element ka mass number kaise nikalte h

atomic number and mass number

atomic mass

chemistry important topic

current classes

mass number of chlorine

how to find mass number of any element

exception kya hota h

mass number of elements from 1 to 20