Elements and Compounds — CHEMISTRY STD 7 — Question
ICSE BoardEnglish MediumSTD 7CHEMISTRYElements and Compounds1 Mark
Question
Define the terms. Ion
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Answer
When an atom loses or gains electrons, it becomes a charged particle called ion. When an atom loses one or more electrons, it forms a positive ion called cation, e.g. Na+ (sodium ion). When an atom gains one or more electrons, it forms a negative ion called anion e.g. CT (chloride ion).
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