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You are watching: Are polyatomic ions covalent or ionic

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There space both similarities and also differences in between molecules and polyatomic ions. First for the similarities:

atoms that are covalently bonded in ~ a molecule are held together by pairs of electrons that are shared in between two atoms. The atom that consist of a polyatomic ion are also covalently bonded, or held...




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There space both similarities and also differences in between molecules and also polyatomic ions. An initial for the similarities:

Atoms that room covalently bonded in ~ a molecule are hosted together by pairs of electron that room shared between two atoms. The atom that make up a polyatomic ion are additionally covalently bonded, or hosted together by common pairs the electrons. In both molecules and also polyatomic ions the atoms are separated from every other as soon as a chemistry reaction bring away place. Phase changes such together melting and also vaporizing don"t involve breaking of covalent bonds. 

There space two key differences in between molecules and also polyatomic ions:

1. Molecules are electrically neutral when polyatomic ions have actually a net charge. In the process of the ion forming one or an ext electrons to be either acquired or lost. Many polyatomic ions have actually an overfill of electrons and are as such negative, such together NO3(-) and also SO4(2-). There is one usual positive polyatomic ion, NH4(+), which has actually one much less electron than it go protons. 

2. Molecule exist together molecular compounds, which normally have low melting and also boiling points since attractions in between individual molecules space weak. Polyatomic ion exist in ionic compounds. A polyatomic ion is attractive to one or an ext oppositely charged ions, creating a compound that exists as a crystal lattice the repeating confident and negative ions. Ionic compounds have actually high melting points due to the fact that a many of energy is required to get over the strong attraction between positive and an adverse ions. An instance of a polyatomic ionic compound is sodium nitrate, NaNO3, i beg your pardon is do of the confident ion Na+ and also the an adverse polyatomic ion NO3(-).