Question #cd83e

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Question #cd83e

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Answer 1 · 2014-02-06T20:53:50

The polyatomic ions that end in -ide include, $O H^{-}$ $OH^-$ hydroxide, $O_{2}^{-}$ $O_2^-$ peroxide, $C N^{-}$ $CN^-$ cyanide, $N H_{2}^{-}$ $NH_2^-$ amide and $H S^{-}$ $HS^-$ hydrogen sulfide.

The -ide suffix, is usually reserved for monatomic anions.

Non-metal ions like oxygen, fluorine and chlorine take on the -ide and become oxide, fluoride and chloride.

Most of the polyatomic ions end in -ite and -ate. $N O_{3}^{-}$ $NO_3^-$ nitrate, $C l O_{2}^{-}$ $ClO_2^-$ chlorite, etc…

The positive monatomic ions keep their common name, however metals can use the -ic and -ous suffixes in $F e^{+ 2}$ $Fe^(+2)$ ferrous and $F e^{+ 3}$ $Fe^(+3)$ ferric, etc...

There is one positive polyatomic $N H_{4}^{-}$ $NH_4^-$ ammonium which uses the -ium suffix.

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Question #cd83e

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