Platinum

Japanese: platina
Platinum

... Periodic table Element symbol = Pt Atomic number = 78 Atomic weight = 195.08 ± 3 Stable nuclide abundance ratio 190 Pt = 0.0127%, 192 Pt = 0.78%, 194 Pt = 32.9%, 195 Pt = 33.8%, 196 Pt = 25.2%, 198 Pt = 7.19% Melting point = 1772 ° C Boiling point = 3827 ° C Specific gravity = 21.45 Electron configuration = [Xe] 4f 14 5d 9 6s 1 Main oxidation number = II, IV Metal element belonging to the VIII group of the periodic table, 6th period (heavy platinum group). Commonly known as platinum. Platinum has been used since ancient times, but the earliest reliable record is said to be in a book published in 1748 by the Spaniard Don Antonio de Ulloa (1716-95), who wrote that in 1735 a new metal similar to silver was discovered near the Pinto River in Colombia.

*Some of the terminology that mentions "platina" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…周期表元素記号=Pt 原子番号=78原子量=195.08±3安定核種存在比 190Pt=0.0127%,192Pt=0.78%,194Pt=32.9%,195Pt=33.8%,196Pt=25.2%,198Pt=7.19%融点=1772℃ 沸点=3827℃比重=21.45電子配置=[Xe]4f145d96s1 おもな酸化数=II,IV周期表第VIII族,第6周期(重白金族)に属する金属元素。俗にプラチナplatinaともいう。白金は古くから用いられていたが,確実な記録としては,スペインのウロアDon Antonio de Ulloa(1716‐95)が1748年に出版した本の中で,1735年コロンビアのピント川の近くで銀によく似た新しい金属が発見されたと記しているのが最も古いといわれている。…

※「platina」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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