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Issue:

Humanities

 

Written by:

Herman G

 

Date added:

March 2, 2012

 

Level:

University

 

Grade:

 

No of pages / words:

37 / 10270

 

Was viewed:

6773 times

 

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Essay content:

The black bar is one angstrom, equal to 10?10 m or 100,000 fm. Classification Smallest recognized division of a chemical element Properties Mass range: 1.67 ? 10?27 to 4.52 ? 10?25 kg Electric charge: zero (neutral), or ion charge Diameter range: 62 pm (He) to 520 pm (Cs) (data page) Components: Electrons and a compact nucleus of protons and neutrons The atom is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons...
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The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons (except in the case of Hydrogen-1, which is the only stable isotope with zero neutrons). The electrons of an atom are bound to the nucleus by the electromagnetic force. Likewise, a group of atoms can remain bound to each other, forming a molecule...
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