A very important part of chemistry is understanding the structure of atoms and the differences ... of an atom that is the defining feature of the atom. It's what makes one element different ...

Electronegativity, an essential characteristic of all elements in the periodic table ... while the less electronegative atom loses electrons and becomes positively charged. The difference in ...

However, there was still a difference between the atomic number of the atom and the atomic mass. Bohr and other scientists knew that there also had to be a neutral particle the same size as a ...