Metalloid - Simple English Wikipedia, the free encyclopedia

A metalloid or semimetal is a chemical element. Metalloids are elements that have the properties of both metal and non-metal elements. It might be shiny, but brittle. It might be dull, but conduct electricity.

The most common semimetal is silicon. Silicon has electrical conductivity between metals and nonmetals. It is a semiconductor.

Group 1 2
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period
1 1
H
2
He
2 3
Li 		4
Be
5
B 		6
C 		7
N 		8
O 		9
F 		10
Ne
3 11
Na 		12
Mg
13
Al 		14
Si 		15
P 		16
S 		17
Cl 		18
Ar
4 19
K 		20
Ca
21
Sc 		22
Ti 		23
V 		24
Cr 		25
Mn 		26
Fe 		27
Co 		28
Ni 		29
Cu 		30
Zn 		31
Ga 		32
Ge 		33
As 		34
Se 		35
Br 		36
Kr
5 37
Rb 		38
Sr
39
Y 		40
Zr 		41
Nb 		42
Mo 		43
Tc 		44
Ru 		45
Rh 		46
Pd 		47
Ag 		48
Cd 		49
In 		50
Sn 		51
Sb 		52
Te 		53
I 		54
Xe
6 55
Cs 		56
Ba 		*
 71
Lu 		72
Hf 		73
Ta 		74
W 		75
Re 		76
Os 		77
Ir 		78
Pt 		79
Au 		80
Hg 		81
Tl 		82
Pb 		83
Bi 		84
Po 		85
At 		86
Rn
7 87
 Fr  		88
Ra 		*
*
 103
Lr 		104
Rf 		105
Db 		106
Sg 		107
Bh 		108
Hs 		109
Mt 		110
Ds 		111
Rg 		112
Cn 		113
Nh 		114
Fl 		115
Mc 		116
Lv 		117
Ts 		118
Og

* Lanthanides 57
La 		58
Ce 		59
Pr 		60
Nd 		61
Pm 		62
Sm 		63
Eu 		64
Gd 		65
Tb 		66
Dy 		67
Ho 		68
Er 		69
Tm 		70
Yb
** Actinides 89
Ac 		90
Th 		91
Pa 		92
U 		93
Np 		94
Pu 		95
Am 		96
Cm 		97
Bk 		98
Cf 		99
Es 		100
Fm 		101
Md 		102
No
Key
Metals Metalloids Nonmetals


An approximate way to classify metalloids is to look at the Periodic Table of elements. See the double diagonal line: top left Boron and Aluminium, bottom right Polonium and Astatine. Those diagonals are the metalloids. Some metalloids are not semimetals, and some semimetals are not metalloids.

[change | change source]
  • Antimony, a semimetal, can be found naturally in the earth.
    Antimony, a semimetal, can be found naturally in the earth.
  • Arsenic is another semimetal that is very toxic.
    Arsenic is another semimetal that is very toxic.
  • Tellurium in a bottle. Tellurium sometimes is found naturally.
    Tellurium in a bottle. Tellurium sometimes is found naturally.
  • Germanium in a tube. Germanium can be used to make semiconductors. Silicon is used more.
    Germanium in a tube. Germanium can be used to make semiconductors. Silicon is used more.
  • Silicon crystal. Silicon is used to make semiconductors.
    Silicon crystal. Silicon is used to make semiconductors.
  • Boron in a tube. Boron is very hard.
    Boron in a tube. Boron is very hard.
Periodic table
H   He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca   Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr   Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
Alkali metals Alkaline earth metals Lanthanides Actinides Transition metals Poor metals Metalloids Other nonmetals Halogens Noble gases
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