Tag: physical properties of metals and non-metals

Eraser, plastic ruler and safety pins are non-metals so they are not magnetic as per the characteristics of non-metals. but safety pins are metals and are magnetic in nature.

Door locks are usually needed to be strong to stop thieves or other trespassing. 

Metal which give out a musical note when struck are called sonorous.

Sonority (of a material) is the property of producing a ringing sound when struck. Most metals are sonorous. Therefore, they are used in many instruments (eg. cymbals and bells). Almost all non-metals are non-sonorous, i.e. they don't produce a ringing sound when struck.

Metals are a common type of ductile material. Copper, aluminum, and steel are examples of ductile metals. The opposite of ductility is brittleness, where a material breaks when tensile stress is applied to lengthen it. Examples of brittle materials include cast iron, concrete, and some glass products. Zinc is relatively more brittle than others.

Sodium is the soft silvery metal at standard temperature and pressure. It can be readily cut with a knife as it is very soft. When freshly cut sodium has a bright silvery luster. If exposed to air the surface rapidly tarnishes, darkening at first and then forming a white coat of sodium hydroxide and sodium carbonate.

Lead (II)acetate also known as sugar of lead,salt of saturn and Goulard's powder is a white crystalline chemical compound with a sweetish taste. It is made by treating lead ($II$) oxide with acetic acid.

The brilliant shine over the freshly cut surface of a metal is called lusture.

Metals are usually solid in nature. There is less metal that is soft in nature. Some metals are used to make items like coins because they are hard and will not wear away quickly.