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because of the three dimensional arrangements of anions and cations in the crystal lattace, we speak of the whole crystal as being an-

ionic compound
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coulombic force
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lattace energy
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polyatomic ion
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Topic: ionic compounds  (Read 3021 times)

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Offline Courtney

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ionic compounds
« on: January 09, 2008, 01:26:47 AM »
Do you know which?
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Offline Alpha-Omega

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Re: ionic compounds
« Reply #1 on: January 09, 2008, 01:30:12 AM »
An ionic compound is three-dimensional array of ions, which are present in a definite ionic ratio that is characteristic of the compound.

Since there are no discrete molecules in the lattice of an ionic substance, only an empirical formula can be used to express its composition.

For example, magnesium chloride, which is composed of a collection of Mg2+ and Cl- ions in the ratio of one to two, the empirical formula is MgCl2. There is no molecular formula for magnesium chloride.

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