the.com/antiparticle

Same mass, opposite charge, and a lethal allergy to meeting its twin.

means A subatomic particle that mirrors a given particle in mass but is opposite in charge (and other quantum properties), and which annihilates into energy on contact with it.

from Built from the Greek-derived prefix 'anti-' meaning 'against' or 'opposite,' plus 'particle' (from Latin 'particula,' a 'small part'). The word entered physics in the early 20th century once theory predicted — and experiment then confirmed — that every particle has a mirror-image counterpart; the positron, antimatter partner to the electron, was the first one caught in the act.

meet & die
collides with its particle, both annihilate into pure energy
first predicted
dirac's equation demanded it exist, math before evidence
missing cousin
universe mysteriously kept matter, ditched almost all antimatter
you contain some
bananas emit positrons from potassium decay occasionally
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