A chemical element is one of ... it helps to first understand that atoms, the basic units of all matter, are made of protons, neutrons and electrons. It is the number of protons, otherwise known ...

Herman, tell how they think the elements were formed. First ... neutrons. When they captured too many, they became unstable. Then some of the neutrons inside them turned into protons and electrons.

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 ...

Oxygen and carbon are both elements. Both are made up of atoms which in turn are made up of protons, neutrons ... of electrons electrons completely fill up the lowest available shell first ...

Players read questions about energy levels and score points by picking the correct element ... two electrons on the first energy level and six electrons on the second energy level. Since this atom has ...