Metalloids

Metalloids (aka Semi-Metals) - Periodic Elements - Chemical Elements

 
 
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Periodic Table

Metalloids included on the Periodic Table based on the IOUPAC 1985 standard


What are Metalloids? Define Metalloids

Metalloids is a term used in Periodic Chemistry when classifying the chemical elements. Each element can usually be classified as a metal or a non-metal based on their general Chemical and Physical Properties. However, metalloids have mixed properties which can be harder to characterize. The word Metalloids is derived from the Latin word 'metallum' meaning "metal" and the Greek word 'oeides' meaning "resembling in form or appearance".

 

What are Metalloids? Common Properties of Metalloids
The terms brittleness, semi-conductivity and metallic lustre are often used as distinguishing indicators of metalloid status. Some metalloids also contract on melting, unlike many other types of metals. They can also form alloys with metals.

Common properties of Metalloids
The elements classed as Metalloids have the following properties in common:

  • Possess some characteristics of metals and some of non-metals
  • Semi-conductive
  • Metallic lustre


 

The Metalloids

 

13

14

15

16

17

2

B
Boron

C
Carbon

N
Nitrogen

O
Oxygen

F
Fluorine

3

Al
Aluminium

Si
Silicon

P
Phosphorus

S
Sulfur

Cl
Chlorine

4

Ga
Gallium

Ge
Germanium

As
Arsenic

Se
Selenium

Br
Bromine

5

In
Indium

Sn
Tin

Sb
Antimony

Te
Tellurium

I
Iodine

6

Tl
Thallium

Pb
Lead

Bi
Bismuth

Po
Polonium

At
Astatine

 

Elements classified as Metalloids
The 7 elements classified as "Metalloids" are located in Groups 13, 14, 15, 16 and 17 elements of the Periodic Table. Elements classified as Metalloids have properties of both metals and non-metals - refer to Metalloid Properties. Some are semi-conductors and can carry an electrical charge making them useful in calculators and computers. In the standard layout of the periodic table, metalloids occur along the diagonal the stair-step line that distinguishes metals from non-metals. The stair-step line of the Metalloids are from Boron to Polonium. Metalloids have properties of both metals and non-metals. The Elements to the upper right of this line display increasing non-metallic behaviour whereas elements to the lower left display increasing metallic behaviour.

 

Elements in the Periodic Table are classified as follows:
  • Metalloids
  • Alkali Metals
  • Alkaline Earth Metals
  • Transition Metals
  • Other Metals
  • Non-metals
  • Halogens
  • Noble Gases
  • Rare Earth Elements

Compare the properties of the elements classified as Metalloids with the other group classifications via Periodic Table Groups and using the Periodic Table.


Metalloids
Details and info regarding all of the Elements can be accessed by clicking the appropriate element link. Compare the properties of each element by using the Periodic Table.

Metalloids

Metalloids are included in The Elements are the building blocks of Modern Science & Chemistry
for a chart that details the weights click
Periodic Table with Atomic Mass


Periodic Table Index Free Online Science Quiz

 

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