The figure listed below shows just a few examples of the color and also brilliance of naturally developing ionic crystals. The regular and also orderly arrangement of ions in the crystal lattice is responsible because that the various shapes of these crystals, while change metal ions provide rise come the colors.

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api/deki/files/78206/CK12_Screenshot_8-9-2.png?revision=1" />Figure 3.6.2: (A) The salt chloride crystal is shown in 2 dimensions. (B) as soon as struck by a hammer, the negatively-charged chloride ions are compelled near each other and also the repulsive force reasons the decision to shatter.

Conductivity

Another characteristic property of ionic compound is your electrical conductivity. The figure listed below shows 3 experiments in which 2 electrodes that are connected to a light bulb are inserted in beakers containing three various substances.

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Figure 3.6.3: (A) Distilled water does no conduct electricity. (B) A hard ionic compound likewise does no conduct. (C) A water solution of an ionic link conducts electricity well.

In the first beaker, distilled water does not conduct a current due to the fact that water is a molecular compound. In the second beaker, solid sodium chloride likewise does no conduct a current. In spite of being ionic and also thus composed of fee particles, the solid crystal lattice does not permit the ions to move in between the electrodes. Mobile charged particles are compelled for the circuit to it is in complete and also the light pear to light up. In the third beaker, the NaCl has actually been liquified into the distilled water. Now the decision lattice has actually been broken apart and also the individual confident and negative ions can move. Cations relocate to one electrode, if anions move to the other, permitting electricity to circulation (see number below). Melting an ionic compound also frees the ions to conduct a current. Ionic compounds command an electric current when melted or dissolved in water. The dissolution of ionic compounds in water will certainly be questioned in section 9.3.

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Contributors and also Attributions

CK-12 foundation by Sharon Bewick, Richard Parsons, Therese Forsythe, Shonna Robinson, and also Jean Dupon.