although that proliferated in the Baroque art the mixed technique that we. call historical, and that combined with a grisaille after hardening usually. with a leaner tempera with warmer hues superimposed in glazes of oil. could eventually be qualified in mordant alternating lean and fat layers.
Because the electrons in ionic solids are localized (in the ions) these solids tend to be stiff and brittle like covalent solids. As solids they do not conduct electricity (again because of the localize electrons).However, they do conduct electricity as liquids (or when dissolved in water) since then the ions can move.istortion away from this geometry can only occur through a breaking of covalent sigma bonds. As a result, the melting point of covalent solids is extremely high. They also tend to be extremely hard substances that will break into pieces rather than smoothly change shape. We say that they are stiff and brittle.
The best answer I can come up with is that covalent molecular are held together by covalent bonds AND intermolecular bonds whereas covalent networks are only held together by â¦ covalent bonds. This means that the intermolecular bonds in covalent molecular are easy to break which is why it has a low boiling point. Covalent networks are all covalently bonded which means they are stronger and have a higher boiling point. I hope that's right because i have a test on this tomorrow. Sorry if it is wrong.