LIFE SCIENCE

Detailed explanation-1: -Ionic compounds are hard and brittle. Ionic compounds dissociate into ions when dissolved in water. Solutions of ionic compounds and melted ionic compounds conduct electricity, but solid materials do not. An ionic compound can be identified by its chemical formula: metal + nonmetal or polyatomic ions.

Detailed explanation-2: -Because of the strong electrostatic interaction between these oppositely charged ions, ionic compounds form rigid crystals.

Detailed explanation-3: -Ionic compounds typically are solids at room temperature. They form a crystal lattice structure when more than one molecule is present (see Figure A). Notice that the positive charges and negative charges alternate. This results in a very strong attractive force between all atoms of the crystal.

Detailed explanation-4: -Ionic compounds have a rigid crystal lattice structure, and high melting and boiling points. Solids of ionic compounds easily break into sheets and are poor conductors of electricity as a solid. As a solid, ionic compounds are good insulators.