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[8th Grade] Week 4 Quiz
By Joshua Kao
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Last updated over 1 year ago
6 questions
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Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Explain why O
2
and O
3
are different compounds
解释为什么 O
2
和 O
3
是不同的化合物
Question 6
6.
A compound has to have 2 or more atoms
化合物必须有 2 个或更多原子, 正确或错误
True
False
This could be an artist's picture of:
hydrogen atoms
氢原子
ammonia molecules
氨分子
oxygen molecules
氧分子
water molecules
水分子
Which of these are correct chemical formulas?
哪些是正确的化学式？
H
2
0
NH
3
OO
CO
2
Which of these is the smallest unit of an element
Atom
原子
Molecule
分子
Compound
化合物
None of these
这些都不是
Which method is best for separating a homogenous mixture of water and acetone?
哪种方法最适合分离水和丙酮的同质混合物？
filtration
过滤
evaporation
蒸发
distillation
蒸馏
magnetic attraction
磁吸引力
