Trick to find out the relative atomic mass || Mass Number || Pashto ‪@NASIBZADASSS‬

Trick to find out the relative atomic mass || Mass Number || Pashto ‪@NASIBZADASSS‬

1) Trick to find out relative atomic mass 2) Trick to find out Mass Number 3) Mass Number of ist 30 elements ‪@NASIBZADASSS‬