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This could be an artist's picture of:
This could be an artist's picture of:
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
This could be an artist's picture of:
Which of these are correct chemical formulas?
哪些是正确的化学式？
Which of these is the smallest unit of an element
Explain why O2 and O3 are different compounds
解释为什么 O2 和 O3 是不同的化合物
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？