Gold is the most malleable and ductile metal; a single gram can be beaten into a sheet of one square meter, or an ounce into 300 square feet. Gold leaf can be beaten thin enough to become translucent. The transmitted light appears greenish blue, because gold strongly reflects yellow and red.
Gold readily forms alloys with many other metals. These alloys can be produced to increase the hardness or to create exotic colors (see below). Gold is a good conductor of heat and electricity, and is not affected by air and most reagents. Heat, moisture, oxygen, and most corrosive agents have very little chemical effect on gold, making it well-suited for use in coins and jewelry; conversely, halogens will chemically alter gold, and aqua regia dissolves it via formation of the chloraurate ion.
2,310,000
1
272,128
2
247,200
3
247,000
4
242,000
5
203,268
6
159,340
7
104,198
8
85,411
9
84,000
10
66,205
11
58,349
12
50,773
13
44,131
14
42,100
15
40,075
16
39,750
17
36,098
18
35,899
19
22,561
20
16,336
21
15,683
22
13,200
23
11,354
24
10,721
25
10,618
26
10,426
Tuesday, August 12, 2008
Top Golg Mining Country lists
Posted by GK at 7:12 AM
Subscribe to:
Post Comments (Atom)
0 Comments:
Post a Comment