User talk:Karl2

Welcome to Wikipedia. We invite everyone to contribute constructively to our encyclopedia. Take a look at the welcome page if you would like to learn more about contributing. However, unconstructive edits, such as those you made to Covalent bond, are considered vandalism. If you continue in this manner you may be blocked from editing without further warning. Please stop, and consider improving rather than damaging the hard work of others. Thanks. G . H e  04:21, 28 July 2006 (UTC)