Tag: physical properties of non-metals

Cores of pencil are made of graphite which leaves grey or black marks that can be easily erased. Graphite pencils are useful for writing as well as drawing too. 

Mercury is the only liquid. Except mercury all metals are solids at room temperature. Mercury is used for making thermometer.

Titanium, sodium and zirconium metals are used in atomic energy and space science projects.

Tungsten filament represents metallic substance.
Tungsten is a metal. Other examples of metals include iron, copper, aluminium, magnesium, sodium, lead, zinc etc.

An essential non metal used in breathing by all living beings is 'Oxygen'

Iodine is a natural dark violet, non-metallic element that plays a key role in human metabolism. Iodine, for example, is slightly soluble in water and gives a yellowish-brown solution. Brown solutions are also formed with alcohol.
Iodine is usually used in an alcohol solution (called tincture of iodine) or as Lugol's iodine solution as a pre- and postoperative antiseptic. Some people do not recommend disinfecting minor wounds with iodine because of concern that it may induce scar tissue formation and increase healing time.

Chlorine is a non-metal which is used to disinfect water. 

A person working with phosphorus suffers from a disease in which bones decay. It is known as phossy jaw.

Neutral oxides are the oxides which show neither basic nor acidic properties when they react with water and they do not form salts when reacted with acids or bases, e.g., carbon monoxide$ (CO)$,nitrous oxide$ (N _2O)$,nitric oxide $(NO),$ etc., are neutral oxides.