
Grade chapter 7.1 Quiz
Quiz
•
Chemistry
•
6th Grade
•
Practice Problem
•
Hard
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪个是物质的基本单位?
原子
分子
质量
空间
Answer explanation
原子是物质的基本单位,它是构成化学元素的最小粒子,具有独立的化学性质和质量。原子是构成分子和晶体的基本组成部分,决定了物质的性质和行为。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气的化学符号是什么?
O
H
Na
Cl
Answer explanation
氧气的化学符号是O。氧气的化学符号是指代氧气元素的简写符号,它是O。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪个是混合物的例子?
黏土
硫
铁
氢气
Answer explanation
黏土是混合物的例子,因为它是由不同的物质组成的。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氢气的化学符号是什么?
O
H
Cl
Na
Answer explanation
氢气的化学符号是H,它代表氢元素。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气和氢气反应后产生的物质是?
氯化钠
二氧化碳
硫
水
Answer explanation
氧气和氢气反应后产生的物质是水。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪个是可混溶的物质?
氧气
氯化钠
铁
硫
Answer explanation
氯化钠是可混溶的物质,因为它可以与水混合形成溶液。其他选项如氧气、铁和硫都不可混溶。
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