|
This reddish metal is a main ingredient of both brass & bronze |
copper
|
$1,200 |
DJ |
COLORFUL SCIENCE |
2008-04-30 |
#5453 |
|
It was the first metal used by man to make tools |
copper
|
$400 |
DJ |
SCIENCE |
1993-03-18 |
#1974 |
|
Malachite is used as a green gemstone & as an ore of this metal |
copper
|
$500 |
J |
SCIENCE |
1991-07-12 |
#1600 |
|
Used for coins, cupronickel is an alloy of this & nickel |
copper
|
$100 |
J |
PHYSICAL SCIENCE |
1991-06-20 |
#1584 |
|
Element represented by the letters "Cu" |
copper
|
$400 |
J |
SCIENCE |
1987-02-02 |
#561 |
|
Sterling silver is not pure silver but an alloy of silver and this metal |
copper
|
$500 |
J |
SCIENCE TRIVIA |
1985-10-24 |
#294 |