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Article #2477Re: Element Question -- Please Help!
From: William R. Penrose
Date: Sun, 05 Jan 1997 00:00
Date: Sun, 05 Jan 1997 00:00
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In article <01bbf9e9$740c9b20$b2000ccf@default> "Arthur, Karen, James & Angie" <flinns@aloha.net> writes: >What three elements are never found separated in nature? 1. All of the uranium and thorium chain isotopes, like uranium+radium+radon. (Actually, there are a lot more than three.) It is because the parent element generates more of the other elements by radioactive decay even if some natural process separates them. 2. The rare earths, which can be separated from one another only with great difficulty and are probably always found together (I don't know of any exceptions). Bill ******************************************************** Bill Penrose, President, Custom Sensor Solutions, Inc. 526 West Franklin Avenue, Naperville, IL 60540 630-369-9618 (temporary) email wpenrose@interaccess.com ********************************************************
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4886,ef850747f32aaa7a X-Google-Attributes: gidf4886,public X-Google-Thread: f59b0,ef850747f32aaa7a X-Google-Attributes: gidf59b0,public X-Google-Thread: 116032,ef850747f32aaa7a X-Google-Attributes: gid116032,public From: wpenrose@interaccess.com (William R. Penrose) Subject: Re: Element Question -- Please Help! Date: 1997/01/05 Message-ID: <wpenrose.277.003DE8A6@interaccess.com> X-Deja-AN: 207916502 references: <01bbf9e9$740c9b20$b2000ccf@default> organization: InterAccess,Chicagoland's Full Service Internet Provider newsgroups: sci.chem,sci.chem.analytical,can.schoolnet.chem.sr