COBALT

 COBALT (27) (Solid)

Atomic radius:1.67Deg. A (Quantum mech. value for a free atom)

Atomic volume:6.7 cm(3)/mol at 300Deg. Kelvin

Atomic weight:58.9332 (Based on Carbon 12)

Boiling point:3201Deg. Kelvin

Covalent radius:1.16Deg. Kelvin

Crystal structure:Hexagonal

Density:8.9 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:.172 10(6) Ohm(x.1) K(x.1) at 293Deg. Kelvin

Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(7)4s(2)

Electronegativity:1.88 (Pauling's)

First ionization potential:7.86 V

Heat of fusion:16.19 kJ/mol at melting point

Heat of vaporization:367.5 kJ/mol at boiling point

Melting point:1768Deg. Kelvin

Oxidation states:2,3 Amphoteric(3)

Specific heat capacity:.42 Jg(x.1) K(x.1) at 300Deg. Kelvin

Thermal conductivity:1.0 W cm(x.1) cm(x.1) K(x.1) at 300Deg. Kelvin

Description:A tough,lusterous,silver-white,magnetic metallic element that is

related to and occurs with iron and nickel,and is used especially in alloys.

Comments

Post a Comment

Popular posts from this blog

BOTTOM LIVE script

                                  BOTTOM                                   ======                     by Adrian Edmondson and Rik Mayall                                 Bottom Live                                 ===========                               Richie  Rik Mayall                                Eddie  Adrian Edmondson Introduction ------------ [Opening shot of theatre, with huge pictures of Richie and Eddie. Caption: "Live from the Mayflower Theatre, Southampton".] Vox Pop 1:  So I'm hoping that this is a lot ruder than the TV, because             they can get away with it. [Cut to Ade's dressing-room door. It opens to reveal a clothes rail, its only contents a brown jacket.] Vox Pop 2:  I just think they're ace, you know, absolutely excellent. [Cut to dressing-gown, pan across a pair of glasses and a revolver.] Vox Pop 3:  It couldn't be too rude, I mean that's what young people want. [Rik's dressing-room door.]
Read more

Evidence supporting quantum information processing in animals

              Evidence supporting quantum            information processing in animals                    James A. Donald                    1068 Fulton Av                    Sunnyvale, CA 94089-1505                    USA I show that quantum systems can rapidly solve some problems for which finite state machines require a non- polynomially large time. This class of problems is closely related to the class of problems that animals can solve rapidly and effortlessly, but are intractable for computers by all known algorithms. 1. Introduction      Animals, including very simple animals, can rapidly and effortlessly perceive objects, whereas computers take nonpolynomial time to do this by all known algorithms [1, 2, 3, 4, 5, 6]. Our persistent inability to emulate perception gives reason to doubt the current paradigm and to look for an alternative paradigm.      Penrose[7] and many others [8, 9, 10] argue from practical considerations, Godel's theorem, and
Read more

ARMIES OF CHAOS

                          ARMIES OF CHAOS -      Before anyone proposes more gun control, he or she should know  about a simple, deadly weapon 4 times as powerful as Dirty Harry's  legendary .44 Magnum -- and at least twice as concealable -- that  _can't_ controlled.        This simple, deadly weapon can be made by anyone -- even a  child -- with unpowered hand tools in an hour's time using $5 worth  of materials, most of which are available around the house anyway.   In traditional form it's reusable an unlimited number of times, and  modern plastics have rendered its disposable version electronically  undetectable.  You can clear a room with such a weapon (more of a  hand-held directional grenade than a gun -- sort of a recycleable  Claymore mine) and it's just one of hundreds of similar time-proven  designs.        Complete instructions for building this simple, deadly weapon  could be given in half the space I'm using here and not require a  single illustrat
Read more