作者affine (cloud)
看板Chemistry
標題[問題] 三D鍵結的傳導電子和有關催化過程的問題
時間Sat Feb 23 01:07:10 2008
題目一
If the conduction band of metallic chromium nano particle was a pure 3d band
with 10,000 chromium ions situated in it, how many conduction electrons would
this cluster have?
(a) 10 (b) 10,000 (c) 40,000 (d) 50,000 (e) 60,000
題目二
Which one of the following statements is not true about catalytic creaking?
(a)It is a process that breaks down large molecules by breaking carbon-carbon
bonds
(b)It is conducted at high temperatures
(c)It is easier to control than pyrolysis.
(d)It can also include hydrocmcking.
(e)It reacts fast and completely.
做題目遇到困難了 有沒有人知道該怎麼解的
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