What is an atom made up and how are atoms of different elements from each other

The atoms are made up of three different types of charges electrons proptons and neutrons, and these are carrying positive negative and neutral charges. The neutral does not carry any charge.

The atoms are different from other elements on the basis of their atomic no. And atomic no. Of elements carring by their ascending property of atoms in the periodic table. As atomic no. Of the elements are different all atoms so atomic no. Of elements refered to atomic masses of elements . The no. of protons are referred to atomic no. Which are different from all elements and atomic masses are same all atoms in periodic table.

a is the correct answer