Friday, November 4, 2016

តើធ្វើដូចម្តេចមាសត្រូវបានបង្កើតឡើង - How Gold is Formed: Gold Documentary - Documentary History Channel - ខំរៀន.khomrean.com

 

ខំរៀន.khomrean.com

Published on Jun 28, 2016
How Gold is Formed: Gold Documentary - Documentary History Channel

Gold is a chemical element with the symbol Au (from Latin: aurum) and the atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, ...

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