Q1:NACI是純離子鍵,AI2O3是有共價性質的離子鍵,WHICH較穩定?
BOOK SAID THAT AI2O3中由於AI2O3不是純離子鍵是有共價性質的離子鍵,有部分分子不是以強大離子鍵連結,是范德華,SO MELTING AND BOILING POINT較低,較不穩定
OTHER BOOK SAID THAT AI2O3的真實晶格焓比理論的更-VE,SO AI2O3較穩定
請問邊本BOOK 對,OR 仲有OTHER ANSWER?
Q2:有個叫札依切夫規則(Saytzeff’s rule )說RR"C=CR""R"""比HRC=CR"R""穩定
但我想問C=C本身巳有很多電子,加上R是釋電子,咁C=C就電荷集中,我想問WHY R數目上升卻可使穩定性上升?
Q3:(H-)氫陰離子的體積比(S2-)硫離子還要大?
化學問題,俠士前進(15分),感激不盡!
2006-12-31 10:15 pm
回答 (3)
2006-12-31 10:33 pm
✔ 最佳答案
In fact, AL2O3 is more stable than NaCl .In the reality, the Al2O3 is a crystal structure.The Al2O3 is a simple covalent moecular but NaCl is a ionic molecule. But the specific structure of AL2O3, make it has both higher m.p.and b.p.Q2: I don't know whether the R group is CH3 or not , if it is methy group , it would distablize the the C=C group, if the group is Cl, F , it would stablize the C=C since they are electron withdrawing group.
Q3:It may be true , but I don't have any signicant data to suuport this assertion. In fact , the H-, the addition e- would impose a great inter-electeronic repulsion, it will expand the electronic cloud so as to stblize itself. However, I cannot say it is larger than S2-since S2- is in the third period already.
Hope I can help you!
參考: myself
2007-01-05 3:53 am
因為是英文，所以由正面跌普通
2006-12-31 10:40 pm
Q1
AI2O3的比理論的更-VE<-----真實晶格焓低指佢容易變真實晶格，唔係指佢穩定
所以第一個解釋岩d
Q2亂碼，睇唔到
Q3因為H-有2粒電子，但得一得中子，咁佢咪有一粒電子無+ve 吸住，所以可以去到無限遠
AI2O3的比理論的更-VE<-----真實晶格焓低指佢容易變真實晶格，唔係指佢穩定
所以第一個解釋岩d
Q2亂碼，睇唔到
Q3因為H-有2粒電子，但得一得中子，咁佢咪有一粒電子無+ve 吸住，所以可以去到無限遠
參考: 自已
收錄日期: 2021-04-12 23:11:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061231000051KK02003