ରୁପା

ରୁପା ([Silver; ସିଲ୍‌ଭର୍] Error: {{Lang-xx}}: text has italic markup (help)) ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Ag (ଗ୍ରୀକ: άργυρος árguros; ଆର୍‌ଗୁରୋସ୍, [argentum; ଆର୍‌ଜେଣ୍ଟମ୍] Error: {{Lang-xx}}: text has italic markup (help), ଉଭୟ ପ୍ରାଚୀନ ଇଣ୍ଡୋ-ୟୁରୋପୀୟ ମୂଳ *arg-ରୁ ଆସିଛି,ମାନେ "grey" କିମ୍ବା "shining") ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୪୭ ।

Silver,  ₄₇Ag

Electrolytically refined silver
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	silver, Ag
Appearance	lustrous white metal
ଉଚ୍ଚାରଣ	/ˈsɪlvər/
Silver in the periodic table
Cu ↑ Ag ↓ Au palladium ← silver → cadmium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	47
ଶ୍ରେଣୀ, ବ୍ଳକ	group 11, d-block
ପର୍ଯ୍ୟାୟ	period 5
ମୌଳିକ ପ୍ରକାର	transition metal
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	107.8682
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Kr] 4d10 5s1
per shell	2, 8, 18, 18, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	1234.93 K ​(961.78 °C, ​1763.2 °F)
ସ୍ଫୁଟନାଙ୍କ	2435 K ​(2162 °C, ​3924 °F)
Density near r.t.	10.49 g/cm3
when liquid, at m.p.	9.320 g/cm3
Heat of fusion	11.28 kJ/mol
Heat of	250.58 kJ/mol
Molar heat capacity	25.350 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1283 1413 1575 1782 2055 2433
Atomic properties
Oxidation states	1, 2, 3 (amphoteric oxide)
Electronegativity	Pauling scale: 1.93
Atomic radius	empirical: 144 pm
Covalent radius	145±5 pm
Van der Waals radius	172 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc)
Speed of sound thin rod	2680 m/s (at r.t.)
Thermal expansion	18.9 µm/(m·K) (at 25 °C)
Thermal conductivity	429 W/(m·K)
Thermal diffusivity	174 mm2/s (at 300 K)
Electrical resistivity	15.87 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	83 GPa
Shear modulus	30 GPa
Bulk modulus	100 GPa
Poisson ratio	0.37
Mohs hardness	2.5
Vickers hardness	251 MPa
Brinell hardness	206 MPa
CAS Number	7440-22-4
ଇତିହାସ
ଆବିଷ୍କାର	before 5000 BC
Most stable isotopes of silver
iso NA half-life DM DE (MeV) DP 105Ag syn 41.2 d ε - 105Pd γ 0.344, 0.280, 0.644, 0.443 - 106mAg syn 8.28 d ε - 106Pd γ 0.511, 0.717, 1.045, 0.450 - 107Ag 51.839% 107Ag is stable with 60 neutrons 108mAg syn 418 y ε - 108Pd IT 0.109 108Ag γ 0.433, 0.614, 0.722 - 109Ag 48.161% 109Ag is stable with 62 neutrons 111Ag syn 7.45 d β− 1.036, 0.694 111Cd γ 0.342 -

ବାହାର ତଥ୍ୟ

• Chemistry in its element podcast (MP3) from the Royal Society of Chemistry's Chemistry World: Silver
• Silver at The Periodic Table of Videos (University of Nottingham)
• Society of American Silversmiths
• The Silver Institute A silver industry website
• A collection of silver items Samples of silver
• Transport, Fate and Effects of Silver in the Environment
• Picture in the Element collection from Heinrich Pniok Archived 2017-05-25 at the Wayback Machine.