物理性質
物理性質（粵拼：mat6 lei5 sing3 zat1；英文：Physical Properties）係指物質唔使發生化學反應就表現出嚟嘅性質[1]。呢啲性質係有得靠感官或者儀器嚟度嘅。物質有時會係液體，有時會係固體，有時會係氣體，呢啲叫做物質嘅相態。一件嘢軟唔軟、透唔透光、透光嘅話佢個折射率（refractive index）係幾多，呢啲都係一件物質嘅物理特性。
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- ↑ William L. Masterton, Cecile N. Hurley, "Chemistry: Principles and Reactions", 6th edition. Brooks/Cole Cengage Learning, 2009, p.13 (Google books)
