| 单词 | proton |
| 释义 | proton (once / 9712 pages) n Atoms are made up of three main particles: protons, electrons, and neutrons. A proton has a positive electrical charge, while electrons are negative. The number of protons and electrons is equal in each atom. The atomic number of an element, which is the number in the upper left corner of its box on the periodic table, is the number of protons in each atom. The hydrogen atom, for example, has just one proton, so it also has one electron and its atomic number is 1. If you have an atom with two protons in its nucleus, you know it can't be a hydrogen atom. WORD FAMILYproton: antiproton, protons+/antiproton: antiprotons USAGE EXAMPLESA proton and an electron will pull toward each other, while two electrons will repel each other. Time(Dec 15, 2016) Firing your particle thrower wraps a stream of protons around them, just like in the movie. Seattle Times(Nov 18, 2016) Even the proton streams from the Ghostbusters equipment danced into the black bars eliciting a slight gasp from audience members. Washington Times(Nov 04, 2016) n a stable particle with positive charge equal to the negative charge of an electron Hypo|Hyper hydrogen ion a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus nucleon a constituent (proton or neutron) of an atomic nucleus |
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