The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and one electron ... When the plastic strip is rubbed on the skin, electrons from the skin are ...

The atoms form a double bond because there is a strong enough attraction in both directions and room for the electrons in the outer energy level of the atoms. The carbon atom and hydrogen atoms are ...

J. Thomson’s discovery that atoms were not indivisible, but contained smaller, negatively charged entities called electrons — the first subatomic particles to be identified. Then, in 1911 ...

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 mass of electrons is very small compared to protons and neutrons. Since a nucleus contains protons and neutrons, most of the mass of an atom is concentrated in its nucleus. Protons and ...