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| a positively charged nucleus neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus |
| the elasticlike force existing in the surface of a liquid caused by asymmetries in the intermolecular forces between surface molecules |
| omega meson
A neutral meson having a mass 1,532 times that of the electron and an average lifetime of 6.6 × 10-23 seconds. See Table at subatomic particle. |