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 ...

We know that matter is made up of particles called atoms and that an element is a substance that is made up of only one kind of atom. But what are atoms made up of? A very important part of ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

Everyone at that time imagined the atom as a "plum pudding ... emitted by the radioactive element radium) at a sheet of gold foil only 1/3000 of an inch thick, and tracing the particles' paths.

A recent study using atom probe tomography (APT), however, successfully characterized trace element distributions in framboids, or spherical clusters of microcrystals of pyrite, with improved ...

The nucleus of each atom contains protons and neutrons. While the number of protons defines the element (e.g., hydrogen, carbon, etc.) and the sum of the protons and neutrons gives the atomic mass, ...