Changes

'''Antimatter''' is composed of fundamental particles that have the opposite [[electric charge]] and quantum spin as those of [[matter]].

'''Antimatter''' is composed of fundamental particles that have the same magnitude but opposite sign of [[electric charge]] as those of [[matter]].

[[Matter]], and therefore everything seen, is made out of particles of nature.  These  particles can be divided into fermions (matter) and bosons (responsible for forces such as electromagnetism and strong nuclear force). Fermions can be further subdivided into baryons and mesons.  Hadrons include the proton and neutron and leptons include the [[electron]], [[muon]] and tau as well as the corresponding neutrinos.  For simplicity, the overwhelming majority of matter in the universe is comprised of protons, neutrons and electrons. Antimatter is matter formed from antiparticles, which have the same mass but opposite [[charge]] and quantum spin to their corresponding particles. When antimatter is brought into contact with normal matter, both particles are destroyed, resulting in an explosion that is, in terms of mass to explosive power, the most powerful known to mankind. This is because the mass of the particles is totally annihilated. Such an annihilation (e.g. an [[electron]] and a [[positron]]), produces two photons. Two are required by the need to satisfy conservation of both energy and momentum. The total mass of the particles is converted into energy, as described by [[E=mc^2]].

[[Matter]], and therefore everything seen, is made out of particles of nature.  These  particles can be divided into fermions (matter) and bosons (responsible for forces such as electromagnetism and strong nuclear force). Fermions can be further subdivided into baryons and mesons.  Hadrons include the proton and neutron and leptons include the [[electron]], [[muon]] and tau as well as the corresponding neutrinos.  For simplicity, the overwhelming majority of matter in the universe is comprised of protons, neutrons and electrons. Antimatter is matter formed from antiparticles, which have the same mass but opposite sign of [[charge]] to their corresponding particles. When antimatter is brought into contact with normal matter, both particles are destroyed, resulting in an explosion that is, in terms of mass to explosive power, the most powerful known to mankind. This is because the mass of the particles is totally annihilated. Such an annihilation (e.g. an [[electron]] and a [[positron]]), produces two photons. Two are required by the need to satisfy conservation of both energy and momentum. The total mass of the particles is converted into energy, as described by [[E=mc^2]].

== Discovery ==

== Discovery ==