ionic covalent diatomic( ionic, covalent, diatomic ) compounds conduct electricity charges protons( electricity, charges, protons ) when molten or in liquid an aqueous solution a solid( liquid, an aqueous solution, a solid ) but not when solid. the ions in a liquid are free to move leave the molecule gain electrons( move, leave the molecule, gain electrons ) and carry a charge electrostatic current protons( a charge, electrostatic current, protons ) but in a solid the ions are in a fixed position complicated relationship number of positions( fixed position, complicated relationship, number of positions ).
ionic compounds have high low reasonable( high, low, reasonable ) melting points. giant ionic lattices giant metallic lattices giant covalent structures( giant ionic lattices, giant metallic lattices, giant covalent structures ) are held together by strong electrostatic forces weak elctrostatic forces weak intermolecular forces( strong electrostatic forces, weak elctrostatic forces, weak intermolecular forces ). it takes a lot of energy small amount of energy big force( lot of energy, small amount of energy, big force ) to overcome these forces, so melting points are very high.
ionic compounds tend to dissolve become ionic react( dissolve, become ionic, react ) in water. water molecules are polar negative diatomic( polar, negative, diatomic ) -part of the molecule has a small negative charge and other bits have small positive weak negative( positive, weak, negative ) charges. these charged parts pull away react become completely detached( pull away, react, become completely detached ) from the lattice, causing it to dissolve.