NEPTUNIUM

 NEPTUNIUM (93) (Synthetic) 236(110,000 years)EC,B-  237(2,14,000 years)A

239(2.346 days)B-

Atomic radius:

Atomic volume:11.62 cm(3)/mol at 300Deg. Kelvin

Atomic weight:237.0482 (Based on Carbon 12)

Boiling point:

Covalent radius:

Crystal structure:Orthorhombic

Density:20.4 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:.00822 10(x6) Ohm(x.1) cm(x.1) at 293Deg. Kelvin

Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(10)4s(2)p(6)4d(10)5s(2)p(6)

4f(14)5d(10)p(6)5f(4)6d(1)7s(2)

Electronegativity:1.36 (Pauling's)

First ionization potential:6.19 V

Heat of fusion:5.19 kJ/mol at melting point

Heat of vaporization:

Melting point:910Deg. Kelvin

Oxidation states:6,5,4,3 amphoteric(6)

Specific heat capacity:.12 Jg(x.1) K(x.1) at 300Deg. Kelvin

Thermal conductivity:.063 W cm(x.1) K(x.1) at 300Deg. Kelvin

Description:A radioactive metallic element that is similar chemically to

uranium and is obtained in nuclear reactors as a by-product of plutonium.

Comments

Post a Comment

Popular posts from this blog

WHAT THE WATCH TOWER BIBLE AND TRACT SOCIETY OF PENNSYLVANIA HAD TO SAY ABOUT WHAT WERE SUPPOSED TO HAVE HAPPENED in 1874

  AWAKEN                                                     Issue #33   1874 - WHAT THE WATCH TOWER BIBLE AND TRACT SOCIETY OF PENNSYLVANIA        HAD TO SAY ABOUT WHAT WERE SUPPOSED TO HAVE HAPPENED THEN.   This issue will comprise mainly of quotes from Watch Tower publications. Present day Jehovah's Witnesses are unlikely to be aware of any of this material. Why ? The Watch Tower had changed it's theology and does not bother to let it's followers know facts about the past especially since the present theology is totally contradictory to what was promoted in the past. Both sets of incompatible conjectures were promoted as being found  and proven in Scriptures. Prior to 1943 if a follower of the Watch Tower questioned any of the Watch Tower's teaching about 1874, that person risked getting kicked out of the group ...
Read more

Uninterruptable Power Source (UPS) FAQ

Article 61549 of news.answers: Xref: freenet.carleton.ca comp.misc:25723 comp.sys.hp.hardware:5708 comp.sys.sun.hardware:24796 comp.sys.sgi.hardware:9261 comp.sys.next.hardware:16000 comp.sys.dec:27561 comp.unix.admin:28511 comp.answers:8765 news.answers:33422 Path: freenet.carleton.ca!cunews!nott!bcarh189.bnr.ca!bcarh8ac.bnr.ca!bnr.co.uk!pipex!howland.reston.ans.net!news.cac.psu.edu!news.pop.psu.edu!hudson.lm.com!netline-fddi.jpl.nasa.gov!phoebe.jpl.nasa.gov!root From: ups@navigator.jpl.nasa.gov Newsgroups: comp.misc,comp.sys.hp.hardware,comp.sys.sun.hardware,comp.sys.sgi.hardware,comp.sys.next.hardware,comp.sys.ibm.hardware,comp.sys.dec,comp.unix.admin,comp.answers,news.answers Subject: Uninterruptible Power Source FAQ Followup-To: comp.misc Date: 10 Dec 1994 13:09:38 GMT Organization: Jet Propulsion Laboratory, Pasadena, CA Lines: 1346 Approved: news-answers-request@MIT.Edu Distribution: world Message-ID: <3cc9ai$fus@phoebe.jpl.nasa.gov> Reply-To: npc@minotaur.j...
Read more

Blade Runner FAQ

Archive-Name: movies/bladerunner-faq Version: 1.4 (May 1993) -------------------------------------------------------------------------------                                  BLADE RUNNER                            Frequently Asked Questions                        Copyright (C) 1993 Murray Chapman ------------------------------------------------------------------------------- Compiled by Murray Chapman (muzzle@cs.uq.oz.au), from sources too numerous to mention.  Thank-you one and all.                                INTRODUCTION                                ------------ The movie "Blade Runner"...
Read more