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开始学习

问题		答案
mixture 开始学习		is a combination of two or more substances
pure substance 开始学习		is a uniform substance that has a fixed and definite composition
compound 开始学习		a pure substance that can be decomposed into simpler substances
element 开始学习		pure substance that can’t be broken down into simpler substances
periodic chart/table 开始学习		a table which presents the symbol, atomic weight, atomic number for each elements
atomic number 开始学习		the number of protons in the nucleus of an atom which is the same as the number of electrons on the electron shells
atomic weight 开始学习		a ratio between the mass of one atom of an element and twelfth of an atom of carbon
matter 开始学习		any substance that has mass and occupies a given/specific volume
solute 开始学习		substance that is dissolved
solvent 开始学习		the substance that dissolves the solute
aqueous solution 开始学习		a solution prepared with the use of water as solvent

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