Find the elements of the following questions. Also have to write down their symbols.
1. Bromine is a reddish brown liquid. What is the appearance of chlorine? Both of them are poisionous. It is ___________.
2. Which element is the lightest ?
3. Suggest two metals which must be stored under oil.
Element__3
2006-10-14 5:53 am
回答 (3)
2006-10-14 5:30 pm
✔ 最佳答案
1. Bromine is a reddish brown liquid. What is the appearance of chlorine? Both of them are poisionous. It is _greenish yellow__________.2. Which element is the lightest ? hydrogen, because the molar mass of hydrogen is 1
therefore ,it is the lightest element.
3. Suggest two metals which must be stored under
Potassium , Sodium . ( All group one element ,, because they are reactive metal, )
2006-10-15 5:52 am
1 It is yellowish green gas
2.hydorgen
3 sodium and potassium : they are highly reactive
2.hydorgen
3 sodium and potassium : they are highly reactive
2006-10-14 6:18 am
1.Greenish yellow
2.Hytrogen
3.Sodium,potassium
2006-10-13 22:19:10 補充：
2.Hydrogen
2.Hytrogen
3.Sodium,potassium
2006-10-13 22:19:10 補充：
2.Hydrogen
收錄日期: 2021-04-20 16:16:23
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061013000051KK04404