| NOUN | object | hydrogen ion | a positively charged atom of hydrogen |
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| Meaning | A positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus. | |
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| Part of | hydrogen atom | An atom of hydrogen |
| Broader | cation | A positively charged ion |
| proton | A stable particle with positive charge equal to the negative charge of an electron | |
| Spanish | ión de hidrógeno | |
| Catalan | ió d'hidrogen | |
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