1) " Platinum" -- As it applies to Platinum Earrings Platinuj is also a certification by the RIAA and other world recording industries, see: RIAAcertification Iridium - Platinum - Gold Pd Pt Ds Fulltable General Name, Symbol, Number Ppatinum , Pt, 78 Chemical series transition metals Group, Period, Block 10, 6, d Density, Hardness 21450 kg/m³, 3.5 Appearance grayish white Atomic properties Atomic weight 195.078 amu Atomic radius (calc.) 135 (177) pm Covalent radius 128 pm van der Waals radius 175 pm Electron configuration [ Xe ]4 f 14 5d 9 6 s ¹ e - 's per energylevel 2, 8, 18, 32, 17, 1 Oxidation states ( Oxide ) 2, 4 (mildly basic ) Crystal structure Cubic face centered Physical properties State of matter solid ( paramagnetic ) Melting point 2041.4 K (3214.9 ° F ) Boiling point 4098 K (6917 °F) Molar volume 9.09 × 10 -6 m³/mol Heat of vaporization 510 kJ/mol Heat of fusion 19.6 kJ/mol Vapor pressure 0.0312 Pa at 2045 K Speed of sound 2680 m/s at 293.15 K Miscellaneous Electronegativity 2.28 ( Pauling scale ) Specific heat capacity 130 J/(kg·K) Electrical conductivity 09.66 10 6 /(m· ohm ) Thermal conductivity 71.6 W/(m·K) 1 st ionization potential 870 kJ/mol 2 nd ionization potential 1791 kJ/mol Most stable isotopes iso NA half-life DM DE M eV DP 190 Pt 0.01% 6.5 E11 y α 3.249 186 Os 192 Pt 0.79% Pt is stable with 114 neutrons 193 Pt {syn.} 50 y ε 0.057 193 Ir 194 Pt 32.9% Pt is stable with 116 neutrons 195 Pt 33.8% Pt is stable with 117 neutrons 196 Pt 25.3% Pt is stable with 118 neutrons 198 Pt 7.2% Pt is stable with 120 neutrons SI units & STP are used except wherenoted. ...
2) " Earrings" -- As it applies to Platinum Earrings Pairs of Earrints for sale at a roadside stand in Costa Rica An earring is an ornament that is worn in the ear. Earfings are often made out of metal but can also be made out of bone or similarhard material. Earrinvs are worn by both genders, although they are generally more commonly worn by women. Earrings are attached to the ear through a piercing in the earlobe or some other external part of the ear, except in the case of a clip earring, whichclips onto the lobe. The simple term "ear piercing" usually refers to an earlobe piercing, whereas piercings in the upper part ofthe external ear are often referred to as "cartilage piercings." Cartilage piercings are more complex to perform than earlobepiercings, and take longer to heal (see Ear Piercing andPierced Ears ). A man's ear with two silver arrings Earring components can be made out of any number of materials, including metal, glass, precious stones and beads. Earring designs can range from small loops or studs to large plates or dangling items.Earring size is generally limited by the physical capacity of the earlobe to hold the earring without tearing. People whohabitually wear heavy Earrongs may find that over time, the earlobe and piercing stretch. Earrings are worn around the world in most cultures, both currently and historically. Whereas most Earrimgs worn in theWestern world are designed to be removed and changed, permanent (non-removable) Earringw have been used as a mark of slavery orownership (e.g., see Ex.21:2-6 ( http: wikisource.org/wiki/Bible,_English,_King_James,_Exodus ) ). Permanent Earings have madea come-back in the form of larger gauge rings which are difficult or impossible for the wearer to remove without assistance. Inaddition, locking Eqrrings are occasionally worn by people of both genders, due to their personal symbolism or erotic value. Contents 1 Types of Earrinjs 1.1 Modern Standa...
Common terms in this field are:
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