Tag: physical properties of metals and non-metals

Lustre is the way light interacts with the surface of a crystal, rock, or mineral. There are various types of lustre like greasy lustre, metallic lustre, dull lustre etc.

Sonorous metals mean a deep, full, pleasing and imposing sound. It is one of the physical properties of a metal through which a sound is produced when metal is hit.

Non-metals are not malleable. They are brittle and hence they break easily. Such non-metals cannot be deformed by a hammer or rolling. Hence, non-metals cannot be deformed to form thin sheets.

All the metals are hard in nature. However, both sodium and potassium metals are soft and can be cut using a knife. The bonding in these metals is weak and electrons are not located over a single atom but over a number of atoms.

Sulphur, chlorine and xenon, all are $p-$block elements.

Most metals are hard except sodium and potassium. They can be easily cut with a knife. Osmium is hard enough to scratch glass.

Non-metals are not malleable. They are brittle and hence they break easily. Such non-metals cannot be deformed by a hammer or rolling. Hence, non-metals cannot be deformed to form thin sheets.

Graphite is a non-metal consisting of 3 carbon atoms. he weak attractions between the layers of atoms in graphite are easily broken. Therefore, graphite is soft and the layers can slide over each other.

Sodium and potassium are soft metal which can be easily cut with a knife.