Over three-quarters of all the elements are metals. Most of the metal elements are dense and shiny. They are strong, but can be easily shaped. They are also good conductors of heat and electricity. Metals are usually found combined with other metals in the Earth’s crust.
There are 16 naturally occurring non-metal elements. All, apart from graphite, a form of carbon, are insulators – poor conductor of heat and electricity. At room temperature four non metals – phosphorus, carbon, sulphur and iodine are solids and bromine is a liquid. The other 11 non-metals are gases.
Semi-metals are called otherwise – metalloids are poor conductor, just like non-metals. Like metals they can also be made to conduct well. Because of this, the semi-metals are called semi conductors. There are nine semi-metals. Some of them are: Boron, Silicon, Germanium, Arsenic, Selenium, etc.
The process of making metals reusable is called metal recycling. It is much cheaper than extracting metals from ores.
There are 16 naturally occurring non-metal elements. All, apart from graphite, a form of carbon, are insulators – poor conductor of heat and electricity. At room temperature four non metals – phosphorus, carbon, sulphur and iodine are solids and bromine is a liquid. The other 11 non-metals are gases.
Semi-metals are called otherwise – metalloids are poor conductor, just like non-metals. Like metals they can also be made to conduct well. Because of this, the semi-metals are called semi conductors. There are nine semi-metals. Some of them are: Boron, Silicon, Germanium, Arsenic, Selenium, etc.
The process of making metals reusable is called metal recycling. It is much cheaper than extracting metals from ores.
