This energy level model shows two electrons on the first energy level and six electrons on the second energy level. Since this atom has a total of eight electrons, it also has eight protons ... 2nd ...

This attraction holds the atom together. It is not possible to locate the exact position of an electron, but the electron cloud shows the region where an electron is most likely to be. When the ...

It also tells us that chlorine has 18 neutrons (35 - 17) and, as the number of electrons and protons are equal in a neutral atom, chlorine also has 17 electrons. The relative mass of a nucleus is ...

The atom is a complex system of particles. It's made up of a central nucleus consisting of protons and neutrons, called ...