Platinum (Pt), chemical element, the best known and most widely used of the six platinum metals of Groups 8–10, Periods 5 and 6, of the periodic table. A very heavy, precious, silver-white metal, platinum is soft and ductile and has a high melting point and good resistance to corrosion and chemical attack. For example, its surface remains bright after being brought to white heat in air, and, though it readily dissolves in aqua regia, it is scarcely attacked by simple acids. (It does dissolve slowly in hydrochloric acid in the presence of air.) Small amounts of iridium are commonly added to give a harder, stronger alloy that retains the advantages of pure platinum.
Platinum, one of the most abundant platinum metals, and its alloys are indispensable in the chemical laboratory for electrodes and for crucibles and dishes in which materials can be heated to high temperatures. Platinum is used for electrical contacts and sparking points because it resists both the high temperatures and chemical attack of electric arcs. Jewelry and dental alloys account for much of its use; platinum-iridium is used for surgical pins. The prototype international standard kilogram of mass was made from an alloy of 90 percent platinum and 10 percent iridium. The electrical resistivity of platinum is relatively high and depends markedly upon the temperature; the International Temperature Scale from −259.35 to 961.78 °C (−434.83 to 1,763.2 °F)is defined in terms of a resistance thermometer made with platinum wire. As a catalyst, platinum has many applications, notably in automotive catalytic converters and in petroleum refining.
The Italian-French physician Julius Caesar Scaliger alluded (1557) to a refractory metal, probably platinum, found between Darién and Mexico. The first certain discovery was in the alluvial deposits of the Río Pinto, Colombia. The Spaniards called the new metal platina del Pinto for its resemblance to silver. The world’s most important deposits occur in the Transvaal of South Africa. Other deposits are found in Russia, Finland, Ireland, Borneo, New South Wales, New Zealand, Brazil, Peru, and Madagascar. In North America native platinum is found in Alaska-Yukon, California, and Oregon, in British Columbia, and in Alberta. Placer deposits are the most productive sources of the native element.
Where My Heart Will Take Me - Russell Watson
Слава вперёдсмотрящему - Aleksandra Pakhmutova
Die Moldau - Bedřich Smetana
Data and Picard - Pogo
Unsere Panzerdivision - Erich-Weinert-Ensemble
This will def cause some drama if you don't put something in Chinese in your desc (or comments). This can lead mistunderstandings. I can help you for the translate.
Also Tag.
MA60 is based from Y-7 originaly An-24.
+1Debate end.
cool and good
rickroll
tag
looks neat!
Just make what you want
If you lost motivation just take a little rest
ok NASA
Affirmative
хорошая самолёт
Su-25T?
get a chopper
HBD ;)
The United States of America is about to be established within an hour! Can't wait!!
+1Mind if I make a liveried version based on this?
Same/Similar livery to this 757.
mind help me a bit?
+1Would you mind if i make a liveried version for my fictional stories based on this craft?
Congrats!
+1Consider ZSL-92?
做个会动的野兽先辈 就像你发的视频那样（暴论
+1Cool and good
Platinum (Pt), chemical element, the best known and most widely used of the six platinum metals of Groups 8–10, Periods 5 and 6, of the periodic table. A very heavy, precious, silver-white metal, platinum is soft and ductile and has a high melting point and good resistance to corrosion and chemical attack. For example, its surface remains bright after being brought to white heat in air, and, though it readily dissolves in aqua regia, it is scarcely attacked by simple acids. (It does dissolve slowly in hydrochloric acid in the presence of air.) Small amounts of iridium are commonly added to give a harder, stronger alloy that retains the advantages of pure platinum.
Platinum, one of the most abundant platinum metals, and its alloys are indispensable in the chemical laboratory for electrodes and for crucibles and dishes in which materials can be heated to high temperatures. Platinum is used for electrical contacts and sparking points because it resists both the high temperatures and chemical attack of electric arcs. Jewelry and dental alloys account for much of its use; platinum-iridium is used for surgical pins. The prototype international standard kilogram of mass was made from an alloy of 90 percent platinum and 10 percent iridium. The electrical resistivity of platinum is relatively high and depends markedly upon the temperature; the International Temperature Scale from −259.35 to 961.78 °C (−434.83 to 1,763.2 °F)is defined in terms of a resistance thermometer made with platinum wire. As a catalyst, platinum has many applications, notably in automotive catalytic converters and in petroleum refining.
The Italian-French physician Julius Caesar Scaliger alluded (1557) to a refractory metal, probably platinum, found between Darién and Mexico. The first certain discovery was in the alluvial deposits of the Río Pinto, Colombia. The Spaniards called the new metal platina del Pinto for its resemblance to silver. The world’s most important deposits occur in the Transvaal of South Africa. Other deposits are found in Russia, Finland, Ireland, Borneo, New South Wales, New Zealand, Brazil, Peru, and Madagascar. In North America native platinum is found in Alaska-Yukon, California, and Oregon, in British Columbia, and in Alberta. Placer deposits are the most productive sources of the native element.
+4ouch
太臭了罢
+4这个好
three numbers
737
SOS
+1Looks good!
Where My Heart Will Take Me - Russell Watson
Слава вперёдсмотрящему - Aleksandra Pakhmutova
Die Moldau - Bedřich Smetana
Data and Picard - Pogo
Unsere Panzerdivision - Erich-Weinert-Ensemble
Lots of song i like, i choosed 5.
+1Try again now.
+1Tags (Steam):
@Fox00One
May I use the front part of the turret on my M1? credits will be given.
+1You know these things like add a part and pass by is aginst the rule right?
Absolutely great!
VAB
+1@Souka Alright.
Are modifacations based on crafts already done allowed?
@Fox00One Works on F/A-18C has resumed.
1) Alive
2) Boeing 757
COOL
+1Good craft! Mind if I use your craft to take several image for my starship?
stop being political
feature this
copy :)
+1@Blue0bull
@asteroidbook345
Can you help me on my vessel?
@LANKO h20不存在的 这辈子都只可能有h6改的（
+4@NightmareCorporation laughes
@Rakoval500k 3 years ago
I could already see these [][]ers yelling such thing like mig 1.44 copy or f-22 copy or something.
+4Romulan doubts
+32b2t
This will def cause some drama if you don't put something in Chinese in your desc (or comments). This can lead mistunderstandings. I can help you for the translate.
Also Tag.
@MintLynx
+1Finally! ASM time!