ପାରଦ

ପାରଦ (English: Mercury; ମର୍କ୍ୟୁରୀ) ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Hg ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୮୦ । ଏହାକୁ ବହୁତ ଲୋକ quicksilver ଭାବେ ଜାଣନ୍ତି ଏବଂ ଆଗରୁ ଏହାର ନାମ hydrargyrum ଥିଲା (ଗ୍ରୀକ: ["hydr-"ମାନେ ଜଳ ଏବଂ "argyros"ମାନେ ରୂପା/ସିଲ୍‌ଭର୍] Error: {{Lang}}: text has italic markup (help)ରୁ ଅସିଛି)

Mercury,  ₈₀Hg

Spectral lines of mercury (UV not seen)
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	mercury, Hg
Appearance	silvery
ଉଚ୍ଚାରଣ	/ˈmɜːrkjəri/ MER-kyə-ree; /ˈkwɪksɪlvər/; /haɪˈdrɑːrdʒrəm/ hy-DRAR-ji-rəm
Mercury in the periodic table
Cd ↑ Hg ↓ Cn gold ← mercury → thallium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	80
ଶ୍ରେଣୀ, ବ୍ଳକ	group 12, d-block
ପର୍ଯ୍ୟାୟ	period 6
ମୌଳିକ ପ୍ରକାର	transition metal
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	200.59(2)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Xe] 4f14 5d10 6s2
per shell	2, 8, 18, 32, 18, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	liquid
ଗଳନାଙ୍କ	234.3210 K ​(−38.8290 °C, ​ −37.8922 °F)
ସ୍ଫୁଟନାଙ୍କ	629.88 K ​(356.73 °C, ​674.11 °F)
Density near r.t.	13.534 g/cm3
Triple point	234.3156 K, ​1.65×10−7 kPa
Critical point	1750 K, 172.00 MPa
Heat of fusion	2.29 kJ/mol
Heat of	59.11 kJ/mol
Molar heat capacity	27.983 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 315 350 393 449 523 629
Atomic properties
Oxidation states	4, 2 (mercuric), 1 (mercurous) (mildly basic oxide)
Electronegativity	Pauling scale: 2.00
Atomic radius	empirical: 151 pm
Covalent radius	132±5 pm
Van der Waals radius	155 pm
Miscellanea
Crystal structure	​rhombohedral
Speed of sound	(liquid, 20 °C) 1451.4 m/s
Thermal expansion	60.4 µm/(m·K) (at 25 °C)
Thermal conductivity	8.30 W/(m·K)
Electrical resistivity	(25 °C) 961n Ω·m
Magnetic ordering	diamagnetic
CAS Number	7439-97-6
ଇତିହାସ
ଆବିଷ୍କାର	Ancient Chinese and Indians (before 2000 BC)
Most stable isotopes of mercury
iso NA half-life DM DE (MeV) DP 194Hg syn 444 y ε 0.040 194Au 195Hg syn 9.9 h ε 1.510 195Au 196Hg 0.15% >2.5×1018 y α 2.0273 192Pt β+β+ 0.8197 196Pt 197Hg syn 64.14 h ε 0.600 197Au 198Hg 9.97% 198Hg is stable with 118 neutrons 199Hg 16.87% 199Hg is stable with 119 neutrons 200Hg 23.1% 200Hg is stable with 120 neutrons 201Hg 13.18% 201Hg is stable with 121 neutrons 202Hg 29.86% 202Hg is stable with 122 neutrons 203Hg syn 46.612 d β− 0.492 203Tl 204Hg 6.87% 204Hg is stable with 124 neutrons

ଧର୍ମ

ବାହାର ଲିଙ୍କ

• Chemistry in its element podcast (MP3) from the Royal Society of Chemistry's Chemistry World: Mercury
• Mercury at The Periodic Table of Videos (University of Nottingham)
• ATSDR – ToxFAQs: Mercury
• Centers for Disease Control and Prevention – Mercury Topic
• EPA fish consumption guidelines
• Global Mercury Assessment report 2002 by the UNEP.
• Global Mercury Project
• Hg 80 Mercury
• Material Safety Data Sheet – Mercury
• Mercury Contamination in fish and Source Control, Oceana
• Natural Resources Defense Council (NRDC): Mercury Contamination in Fish guide – NRDC
• NLM Hazardous Substances Databank – Mercury
• BBC – Earth News – Mercury 'turns' wetland birds such as ibises homosexual