亚瑟世界亚瑟中文门户

亚瑟世界亚瑟中文门户
PTOV
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亚瑟世界亚瑟中文门户
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亚瑟世界亚瑟中文门户 Diamonds
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ELEMENT:
Krypton
亚瑟世界亚瑟中文门户
SYMBOL:
Kr
ATOMIC NUMBER:
36

   
 
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PTOV is created by video journalist Brady Haran working with chemists at The University of Nottingham