____ make up all materials. There are ____ parts to atoms, called (p) ____(n)____and (e)____. The electrons are ____ charged, the protons are ____ charged and the neutrons have ____. The centre of the atom is called the ____and contains the protons and neutrons. The electrons move round the ____ of the atom in shells. It is the electrons that can be ____ from the atom and make ____. Atoms usually have ____ charge and are called ____ because the number of protons in the nucleus is ____ the number of electrons in the orbits. However, ____ one object on a different object can remove electrons from atoms. When the electrons are "stolen" and made to move we have an ____. We sometimes call these electrons ____ because they have a negative charge.

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