Lustrous yellow metal in the form of blocks can dimmable The Cefaiha tortillas seems green or blue. The gold section Tkotaiaa accurate - like other metal powders - is characterized black While there are other types of gold ranging in color from ruby and purple.
The gold in the transitional group number (11) of the periodic table, and its atomic number (79), and atomic weight (196.967), and has a specific gravity (19.3). And gold melts at a temperature of (1063) degrees Celsius and boils at 2500 C. Gold and a good conductor of heat and electricity, and unsurpassed in this status only silver and copper.
0 التعليقات:
إرسال تعليق