二下 1粒子的模型+ 2元素与元素符号+ 3物质的组成和化学式
Quiz
•
Chemistry
•
6th Grade
•
Medium
林愿俐 林愿俐
Used 63+ times
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17 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
根据质量守恒定律判断,在 中, 物质的化学式是( )。
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在化学反应中,若反应物中没有气体,生成物有气体产生,则需要在气体的化学式旁边用( )表示,若反应中没有固体,而生成物中有固体,则需要在固体的化学式旁边用( )表示。
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1.地壳中含量最多的元素是( )
A.氧
B.铝
C.硅
D.铁
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.国际通用的元素符号是用1个或2个拉丁文字母表示的,其中第一个字母大写,第二个字母小写。镍元素的拉丁文名称为Niccolum,则镍的元素符号为( )
A.Ni
B.NI
C.N
D.Na
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5.下面元素符号正确的是()
A.金aU
B.锰Mn
C.氦he
D.银AG
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6.元素符号“N”可以表示()
A.氮气的化学式
B.1个氮原子
C.1个氮元素
D.氮原子质量
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7.Fe2O3中Fe的化合价是 ( )
A.-3
B.-2
C.+2
D.+3
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