常见元素和原子团的化合价
Authored by xi yang
Chemistry
8th Grade
Used 6+ times
AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
甲醛（化学式CH2O）是室内装潢时的主要污染物之一。下列说法中正确的是（ ）
A．甲醛分子由碳、氢、氧三种元素组成
B．甲醛分子由碳原子、氢气分子、氧原子构成
C．甲醛由一个碳元素、2个氢元素、一个氧元素组成
D.一个甲醛分子由一个碳原子、两个氢原子、一个氧原子构成
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
扬州推广“LED”绿色节能光源。砷化镓(GaAs) 是光源材料，Ga为+3价，As的化合价为( )
-3
-5
+3
+5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
次氯酸钙[Ca(ClO)2]能起杀菌、消毒作用，其中钙元素的化合价为+2，氧元素的化合价为－2，则氯元素的化合价是
+1
-1
+2
-2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
求出KMnO4中Mn的化合价
+6
-6
+7
-7
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
求出K2MnO4中Mn的化合价
+5
+6
+7
+8
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
试确定氯酸钾（KClO3）中氯元素的化合价
+3
+4
+5
+6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
求出H2SO4中S的化合价
+4
+5
+6
+7
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports
Continue with Google
Continue with Email
Continue with Microsoft
or continue with
%20(1).png)
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?
