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 ...

Now, to make the diagrams simpler we often just draw them as circles. So now an atom is the smallest particle of an element. There are over one hundred different elements and these are all made of ...