Elements
33

As

Arsenic

Arsenic (As) is a grey metalloid that has the atomic number 33 in the periodic table. It is located in Group 15 of the periodic table. It has the symbol As.

Arsenic is a semi metal that is used in semiconductors and also in lead batteries for cars. Whilst Silicon is the most common semiconductor arsenic is also commonly used due to its ability to conduct a current. Arsenic also has a use in pesticides however it is a very toxic compound to biological organisms. Until recently it was thought to be dangerous to living organisms but a number of bacteria have recently been discovered that uses arsenic in their metabolism. Arsenic was isolated by Jabir Ibn Hayyan in 815 AD but was first prepared by Johann Schoder who wrote a paper on two ways to isolate arsenic crystals. In Victorian times arsenic was mixed with vinegar and chalk and eaten by women to improve their complexion however it was proved to be a poison. It is located in Group 15 and it has a melting point of 817°c and a boiling point of 613°c being a solid at room temperature.

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FAQ's

What is the Melting Point for Arsenic?

Arsenic has a Melting Point of 817°F, meaning at 817°F it will turn to a liquid.

What is the Boiling Point for Arsenic?

Arsenic has a Boiling Point of 613°F, meaning at 613°F it will turn to a Gas.

What is the Electronegativity of Arsenic?

Arsenic's Electronegativty is 2.18. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Arsenic?

Arsenic has a Heat of Vaporization of 34.76 kJ/mol.

Uses

Many of its compounds are deadly poison and used as weed killer and rat poison. Conducts electricity. Used in semiconductors. Some compounds, called arsenides, are used in the manufacture of paints, wallpapers, and ceramics.

Sources

Found in mispickel (arsenopyrite)

33
Protons
33
Electrons
42
Neutrons

As

Element Symbol
As
Atomic Weight
74.922
Atomic Number
33
State
Solid
Melting Point
Unknown
817
°C
Boiling Point
613
Unknown
°C
Heat of Vaporization
34.76
Unknown
kJ/mol
Crystal Structure
Rhombohedral
Thermoconductivity
0.5
Unknown
W/cmK
Shells
2,8,18,5
Group
Metalloid
Period
4
Block
P Block
Orbitals
[Ar] 3d10 4s2 4p3
Coefficient of Thermal Expansion
15.4 10^-6 K^-1
Covalent Radius
1.20 Å
Density at 293K
5.72 g/cm³
Electrical Conductivity
0.0345 10^6/cm ohm
First Ionization Potential
9.8152 V
Second Ionization Potential
18.633 V
Third Ionization Potential
28.351 V
Ionic Radius
.58 (+3) Å
Oxydation States
(±3),5
Lattice Parameter
4.1319 Å
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

AR-s'n-ik

Discovered by

Known to the ancients & Albertus Magnus

Discovery date

1250

Orbital configuration
2,8,18,5

Download the Periodic Table

Explore Other Metalloids

127.6
52

Te

Tellurium
28.085
14

Si

Silicon
72.63
32

Ge

Germanium
10.811
5

B

Boron
121.76
51

Sb

Antimony
Metalloids are the chemical elements with the properties intermediate between those of typical metals and nonmetals. There is neither standard definition of a metalloid nor agreement on elements classified as such.
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