1、O
九年级化学常见物质的性质归纳
7、
CO
物理性质
化学性质
：（1）无色无味的气体（2）密度比空气小（3）难溶于水
8
2、N2
3、H
4、H2O 化学性质（1）通电易分解2H2O===2H2↑+O2↑
（2）能与某些氧化物反应CaO+H2O===Ca（OH）2，CO2+H2O===H2CO3
物理性质：（1）金刚石最硬。（2）石墨是最软的矿物之一，有优良的导电性，
9、酸
5、C可做干电池的电极；有滑腻感，可做润滑剂。
（3）活性炭和木炭有吸附性
化学性质：（110
6、CO2
（2）
物理性质：（1）无色无味的气体（2）密度比空气大（3）能溶于水
11
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At the end, Xiao Bian gives you a passage. Minand once said, "people who learn to learn are very happy people.". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of continuous learning, "life is diligent, nothing can be gained", only continuous learning can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!
