
J2下Chap2
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
曼妮 李
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38 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氯原子和氯离子属于?【古作8(J2下1)_J2下2】
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
地球中含量最高的两个元素分别是()。【董作3_J2下2.1】
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列元素符号和名称都书写正确的是( )。【古作1_J2下2.2】
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列符号中表示 2 个氢原子的是( )。【古作2_J2下2.2】
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
右图是元素周期表中的一格,下列叙述不正确的是( )。【古作5_J2下2.2】
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
酒精饮料都含有乙醇 (CH₃CH₂OH), 一个乙醇分子含有的碳、氢、氧原子的比例是( )。【古作7_J2下2.2】
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下表中,哪一些是相同的元素?【董作1_J2下2.2】
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