作者howchiu (小秋雨)
看板Chemistry
标题[学习] 请教几个观念^^
时间Sat Jun 30 23:33:37 2007
1.The triple point of iodine is at 90 torr and 115度C .
this means that liquid I2 (g)
(A) is more dense than I2 (s)
(B) cannot exist above 115度C
(C) cannot exist at 1 atmosphere pressure
(D) cannot hve a vapor pressur less than 90 torr
(E) can exist at pressure of 10 torr
这题我选的是D 但不知对不对
2.With which of the following elements does silicon form the strongest bond
(A) Si
(B) C
(C) H
(D) O
(E) B
这题应该不是氧和氢 但不知是Si还是B
3.Solid MgO has the same crystal structure as NaCl.
How many oxide ions surround each Mg2+ ion as nearst neighbors in MgO
(A) 4
(B) 6
(C) 8
(D) 10
(E) 12
这题好像是高中的吧 不过太久远了...
以上 请大家多帮忙^^
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1F：→ nestealee:2. is O 07/01 00:22
2F：→ howchiu:可是Si不是有d轨 不能和氧overlap吗 ? 07/01 15:59