The atom is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons. 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 nuclide with no neutron). 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. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive or negative charge and is an ion. An atom is classified according to the number of protons and neutrons in its nucleus: the number of protons determines the chemical element, and the number of neutrons determine the isotope of the element.
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Acer Aspire One AOA150-1126 8.9-Inch Netbook - White: Computer & Accessories
LaptopPriceDrop
#Acer Aspire One AOA150-1126 8.9-Inch #Netbook - White (USED) - dropped $15.00, now $235.00 - http://bit.ly/ceyPFR #Laptop #Sale
45 minutes ago
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Une tablette Samsung au second semestre
43 minutes ago
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Twitter
Available domain name of the week.
domainoftheweek
Syruptitious. The available domain name of the week is toastwaffle.com http://splorp.com/domain/#toastwaffle
41 minutes ago
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Available domain name of the week.
splorp
This just makes me laugh … Syruptitious. The available domain name of the week is toastwaffle.com http://splorp.com/domain/#toastwaffle
37 minutes ago
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Refurbished Lenovo ThinkPad X41 1.6GHz 12Tablet PC for $330 + free shipping
trishaahlman
Refurbished Lenovo ThinkPad X41 1.6GHz 12\Tablet PC for $330 + free shipping|Buy.com offers the refurbished .. http://oohja.com/x90qj
33 minutes ago
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reputedly
Android based TV's. Imagine the growth of online communities if it was as easy as changing a channel to go online. http://bit.ly/cA2qnE
31 minutes ago
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Seesmic
Archos va proposer un netbook dual core
tomshardwarefr
Archos va proposer un netbook dual core http://short.to/1ol92
28 minutes ago
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JustAskOmar
Google Wants Your TV: The Google TV box is real, and it's aimed right at your living room.
http://bit.ly/9ZbB82
16 minutes ago
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Samsung N310 10.1-inch Netbook (Atom N280 1.66 GHz Processor, 1 | Netbook Review
uknetbooks
Samsung N310 10.1-inch Netbook (Atom N280 1.66 GHz Processor, 1 (http://bit.ly/b1QDQ1)#netbook #Atom #Battery_Life #Cell_Battery #Gb_Hdd
8 minutes ago
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Google, Intel, Sony to join forces on 'Google TV'
darshic
Is there a google free domain anymore Google, Intel, Sony to join forces on 'Google TV' - Times Online: http://bit.ly/b5wS9T via @addthis
7 minutes ago
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