Covalent bonds form between ____ atoms. A covalent bond forms when two positive ____ are held together by their common attraction for a shared ____. Covalent ____ substances: have ____ covalent bonds ____ the molecules and only ____ attractions ____ the molecules Covalent molecular substances have ____ melting and boiling points as only ____ ____ between the molecules are broken when a substance changes state Covalent molecular substances ____ conduct electricity because they do not have charged particles which are free to move. Covalent molecular substances which are ____ in water may dissolve in other solvents. Covalent network structures have a network of ____ covalent bonds within one giant structure. They have very ____ melting and boiling points because the network of strong covalent bonds is not easily broken. They ____ dissolve. In general, covalent network substances do not conduct electricity. This is because they do not have charged particles which are free to move. ____ are formed when atoms lose or gain electrons to obtain the stable electron arrangement of a ____. In general, ____ atoms lose electrons forming ____ ions and ____ atoms gain electrons forming ____ ions. Ionic bonds are the electrostatic attraction between ____ and negative ____. They have ____ melting and boiling points because ____ ionic bonds must be broken in order to break up the lattice structure. Ionic compounds conduct electricity only when ____ or in ____ as the lattice structure breaks up allowing the ions to be free to move. Conduction in ionic compounds can be explained by the movement of ____ towards ____ charged electrodes.

Bonding N5

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