Question

How one can memorize neutrons without knowing atomic mass? ​

Answer 1

Answer:

There's no need to learn the atomic masses of each and every elements.

You have to know the atomic masses of first 20 elements, some transition metals, gr 18 elements and some elements like uranium, thorium etc.

The atomic mass is double the atomic number of an element. But it is not applicable for all the elements in the periodic table.

The atomic masses of elements like He, Li, C, N, O, Ne, Si, S, Cl, Ca are double the atomic number.

The atomic masses of elements like Be, B, F, Na, Mg, Al, P, Ar and K are not double the atomic number.

For these elements just double the atomic number and add 1.

All The Very Best and Good Luck :)