Smallest particle of an element that has the properties of that element

Neutron (n0)

Particle with about the same weight as a proton; uncharged and thus electrically neutral; found within a nucleus

Electron (e-)

Extremely small particle with almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus


Particle that is electrically charged because it has gained or lost one or more electrons

Proton (p+)

Relatively large atomic particle; carries a positive electrical charge and is found within a nucleus


Particle formed by the chemical union of two or more atoms

Major Elements in the Human Body (by Weight)


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Essentials of Human Physiology

Essentials of Human Physiology

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