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Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
What are polyatomic ions? Give examples.
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Answer

A polyatomic ion is a group of atoms carrying a charge (positive or negative). For example, ammonium ion $\big(\text{NH}_{4}^{+}\big),$ hydroxide ion $\big(\text{OH}^-\big),$ carbonate ion $\big(\text{CO}_{3}^{2-}\big),$ sulphate ion $\big(\text{SO}_{4}^{2-}\big).$

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