ଆର୍ସେନିକ

ଆର୍ସେନିକ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ As ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୩୩ ।

Arsenic,  ₃₃As

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	arsenic, As
Appearance	metallic grey
ଉଚ୍ଚାରଣ	/ˈɑːrsnɪk/ AR-sə-nik, also /ɑːrˈsɛnɪk/ ar-SEN-ik when attributive
Arsenic in the periodic table
P ↑ As ↓ Sb germanium ← arsenic → selenium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	33
ଶ୍ରେଣୀ, ବ୍ଳକ	group 15 (pnictogens), p-block
ପର୍ଯ୍ୟାୟ	period 4
ମୌଳିକ ପ୍ରକାର	metalloid
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	74.92160(2)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Ar] 4s2 3d10 4p3
per shell	2, 8, 18, 5
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
Sublimation point	887 K ​(615 °C, ​1137 °F)
Density near r.t.	5.727 g/cm3
when liquid, at m.p.	5.22 g/cm3
Triple point	1090 K, ​3628 kPa
Critical point	1673 K, ? MPa
Heat of fusion	(grey) 24.44 kJ/mol
Heat of	? 34.76 kJ/mol
Molar heat capacity	24.64 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 553 596 646 706 781 874
Atomic properties
Oxidation states	5, 3, 2, 1, -3 ​mildly acidic oxide
Electronegativity	Pauling scale: 2.18
energies	(more)
Atomic radius	empirical: 119 pm
Covalent radius	119±4 pm
Van der Waals radius	185 pm
Miscellanea
Crystal structure	​trigonal
Thermal conductivity	50.2 W/(m·K)
Electrical resistivity	333 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	8 GPa
Bulk modulus	22 GPa
Mohs hardness	3.5
Brinell hardness	1440 MPa
CAS Number	7440-38-2
ଇତିହାସ
ଆବିଷ୍କାର	Early Bronze Age (2500 BC)
First isolation	Albertus Magnus (1250)
Most stable isotopes of arsenic
iso NA half-life DM DE (MeV) DP 73As syn 80.3 d ε - 73Ge γ 0.05D, 0.01D, e - 74As syn 17.78 d ε - 74Ge β+ 0.941 74Ge γ 0.595, 0.634 - β− 1.35, 0.717 74Se 75As 100% 75As is stable with 42 neutrons

ଅଧିକ ପଢନ୍ତୁ

• James G. Whorton (2011). The Arsenic Century. Oxford University Press. ISBN 978-0-19-960599-6.

ବାହାର ଲିଙ୍କ

• CTD's Arsenic page and CTD's Arsenicals page from the Comparative Toxicogenomics Database
• A Small Dose of Toxicology
• Arsenic in groundwater Book on arsenic in groundwater by IAH's Netherlands Chapter and the Netherlands Hydrological Society
• Contaminant Focus: Arsenic by the EPA.
• Environmental Health Criteria for Arsenic and Arsenic Compounds, 2001 by the WHO.
• Evaluation of the carcinogenicity of arsenic and arsenic compounds by the IARC.
• National Institute for Occupational Safety and Health – Arsenic Page
• National Pollutant Inventory – Arsenic
• origen.net – CCA wood and arsenic: toxicological effects of arsenic
• Arsenic at The Periodic Table of Videos (University of Nottingham)