Matter whch is composed of antiparticles such as antiprotons, positrons, and antineutrons.
Matter consisting of elementary particles that are the antiparticles of those making up normal matter. A particle and its antimatter particle will annihilate when they meet, and energy is released according to Einstein's E = mc2. Antiparticles have the same mass as their counterpart, but the opposite charge.
Matter composed of the antiparticles of normal matter. A particle and its antiparticle have a number of opposite properties. A proton is electrically positive; an antiproton is electrically negative. When a particle and its antiparticle meet, they annihilate into pure energy. The antiparticle and particle have exactly the same mass and so are affected by gravity in the same way.
All particles of ordinary matter ( electrons, protons, neutrons) have anti-matter partners that appear identical in all respects (e.g. mass, spin) except that they have the opposite electric charge. We believe that in the Big Bang equal quantities of matter and antimatter were created. The fact that the universe now contains matter and not anti-matter is known as the matter-anti-matter asymmetry. Understanding how this asymmetry was produced is a major goal in particle physics and astrophysics.
matter that has the same gravitational properties as ordinary matter, but that has an opposite electric charge as well as opposite nuclear force charges.
A type of matter in which each particle (antiproton, antineutron, etc.) is opposite in charge and certain other properties to a corresponding particle (proton, neutron, etc.) of the same mass of the ordinary type of matter from which the solar system is made. Particles of antimatter are known to exist, but it is not known why matter is dominant in this region of the universe or whether regions exist in which antimatter is common.
matter consisting of antiparticles such as antiprotons, antielectrons (positrons), and antineutrons.
Matter identical in behavior to ordinary matter but containing the oppositely charged or neutral counterparts of ordinary matter. Example: the proton carries a positive charge; the antiproton carries an equal but negative charge.
A material made from antiparticles. The particles that are common in our universe are defined as matter and their antiparticles as antimatter. In the particle theory there is almost no a priori distinction between matter and antimatter. Their interactions are almost identical. The asymmetry of the universe between these two classes of particles is a deep puzzle which is yet to be fully understood.
Matter consisting of antiparticles: antiprotons (protons with negative rather than positive charge), positrons (positively charged electrons), and antineutrons.
Matter made up of elementary particles whose masses are identical to their normal-matter counterparts but whose other properties, such as electric charge, are reversed. The positron is the antimatter counterpart of an electron, with a positive charge instead of a negative charge. When an antimatter particle collides with its normal-matter counterpart, both particles are annihilated and energy is released.
The 'opposite' to ordinary matter. For every particle of ordinary matter there is an almost identical antiparticle of antimatter: protons and antiprotons; electrons and positrons... the particle's mass is exactly the same as its antiparticle's mass, but their electrical charges - and other fundamental properties - are opposite. When a particle meets its antiparticle, they annihilate each other.
Any subatomic particle identical in mass to a proton, neutron, or electron, but with the opposite charge.For example, a positron is a positive electron.A collision between a particle and its respective antiparticle results in both being annihilated, with their masses converted to photons of equivalent energy.
For every type of matter particle there is a corresponding antiparticle. Antimatter particles carry opposite charges from the corresponding matter particles.
Matter that has the same gravitational properties as ordinary matter, but an opposite electric charge and nuclear force charge.
A form of matter which, when it comes into contact with normal matter, causes choking and crying.
matter that is exactly the opposite in every way from its matter counterpart: antiquark/quark; positron/electron
every matter particle has an antimatter partner, a particle that has exactly the same mass and exactly opposite electric charge. The existence of antimatter partners is required by the laws of modern physics. If a particle comes into contact with its own antiparticle, the pair can annihilate and produce pure energy. Conversely, from this pure energy can come other particle-antiparticle pairs.
Material made from antifermions. We define the fermions that are common in our universe as matter and their antiparticles as antimatter. In the particle theory there is no a priori distinction between matter and antimatter. The asymmetry of the universe between these two classes of particles is a deep puzzle for which we are not yet completely sure of an explanation.
A form of matter that is composed of particles that exhibit opposite quantum mechanical properties from particles of normal matter. As an example, positrons are the antimatter particles that correspond to electrons, which are made of regular matter. A positron is simply an electron with a positive, rather than negative, charge. When matter and antimatter particles encounter each other, the annihilate to become energy according to Einstein's famous equation E=mc^2. Pairs of matter and antimatter particles can also be created from energy. Most of the matter in the universe is normal matter; there has been very little antimatter present in the universe since the Big Bang. See also
A form of matter having an opposite charge than is normally the case; for example, a positively charged positron is the antimatter opposite of a negatively charged electron.
