Atoms are in fact made up of three smaller particles called protons, electrons and neutrons. The protons and neutrons are contained in the nucleus, the tiny centre of an atom, with smaller ...

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

Atoms contain protons, neutrons and electrons. The electrons are arranged ... The three common Group 7 elements are chlorine, bromine and iodine. The word ‘halogen’ means 'salt former'.

For example, baryons, such as protons and neutrons, are combinations of three quarks bound tightly together by strong force-carrying gluons. When individual quarks are ripped from hadrons ...