Akagane

Japanese: あかがね

…Periodic tableElement symbol = CuAtomic number = 29Atomic weight = 63.546 ± 3Abundance in the earth's crust = 55 ppm (25th place)Abundance ratio of stable ^nuclides63 Cu = 69.1%, ⁶⁵ Cu = 30.9%Melting point = 1084.5 ° CBoiling point = 2595 ° CSpecific gravity of solid = 8.92 (20 ° C)Specific gravity of liquid = 8.3 (1083 ° C)Electron configuration = [Ar] 3d ¹⁰ 4s ^1Major oxidation numbers = I, IIOne of the metallic elements belonging to the IB group of the periodic table. Along with gold of the same group, it is a representative colored metal, and the Japanese name "akagane" comes from this color. Copper, along with gold, is probably the metal that humans have used since ancient times. …

[Copper alloys]

…Copper is also a colored metal, and its color changes depending on the alloy it is made from. Pure copper has a distinctive red color and is also called akagane (red metal), but when zinc is added, it turns yellow (such as brass). When nickel is added, it turns silvery white (such as cupronickel). …

*Some of the terminology explanations that mention "Akagane" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…周期表元素記号＝Cu　原子番号＝29原子量＝63.546±3地殻中の存在度＝55ppm(25位)安定核種存在比　⁶³Cu＝69.1％，⁶⁵Cu＝30.9％融点＝1084.5℃　沸点＝2595℃固体の比重＝8.92(20℃)液体の比重＝8.3(1083℃)電子配置＝［Ar］3d¹⁰4s¹　おもな酸化数＝I,II周期表第IB族に属する金属元素の一つ。同族の金とともに代表的な有色金属で，和名〈あかがね〉はこの色に由来している。銅は金とともに，おそらく人類が最も古くから使っていた金属であろう。…