The elements which exhibit the
properties of metals as well as non-metals are called metalloids. Examples:
Boron, Silicon, Arsenic, Germanium, Antimony, Tellurium and Polonium.
a. Physical properties
• Metalloids are solids at room
• They can form alloys with other
metalloids, such as silicon and germanium, can act as electrical
conductors under specific conditions. Thus, they are called semiconductors.
which is a metalloid appears lustrous, but it is neither malleable nor
ductile. It is brittle - a characteristic of some non metals. It is a much
poorer conductor of heat and electricity than the metals.
physical properties of metalloids tend to be metallic, but their chemical
properties tend to be non-metallic.
b. Uses of Metalloids
is used in electronic devices.
is used in fireworks and as a fuel for ignition in rocket.