What is angular momentum and linear momentum?
how are they different?

It is the areas with lines. this may sound a little confusing, but i hope it !

This question is incomplete and not physics but i'm  willing to if you can give a better question

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.