Re: pinhole bonding

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From: NFetter@aol.com
Date: Sat Apr 23 2005 - 13:31:55 PDT 

From: NFetter@aol.com
Message-ID: <1f3.864b559.2f9c0abb@aol.com>
Date: Sat, 23 Apr 2005 16:31:55 EDT
Subject: Re: pinhole bonding

Hi Mike,
Some transition metals lose electrons easily to form ionic compounds with
other elments. Copper, for example readily forms +2 and +1 ions. Some transition
elements are chemically inert, for example gold and platinum. Howerver, under
strenuous conditions, even these metals will forn ions. The chemical
reactivity of tranistion elements is a function, in part, of "f" level orbital electron
configurations. Metallic bonds are different from ionic and covalent bonds in
that bonding electrons are free to move from one positive metal ion to
another, hence, metals are electrical conductors in the solid state. Ionic and
covalent compounds are not electrical conductors in the solid state. Metallic bonds
are a sort of electron soup if you will.
Neil Fetter

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