化学式与化合价一、填空化学式的定义：用________和__________的组合表示物质组成的式子。2、写出葡萄糖（化学式为C6H12O6）的化学式的意义：宏观：______________________________，_______________________________。微观：______________________________，_______________________________。写出下列符号中数字“2”的含义：2H2O：______________________________，_______________________________。2S2-：______________________________，_______________________________。P2O5：______________________________，_______________________________。3Mg2+:_______________________________,用化学用语填空：镁________2个铝离子________3个亚铁离子________4个氧离子________5个铜离子________锌离子________银离子________铁离子__________钾离子__________钙离子__________铝离子________氢离子_________氯离子__________氢氧根离子________2个硝酸根离子________3个硫酸根离子________，4个碳酸根离子________，5个铵根离子________，+4价的碳元素________，标出氯化钠中钠元素的化合价____________标出氧化钙中钙的元素的化合价________。请在横线上默写化合价口诀___________________________;_____________________________.___________________________;________________________________________________________;________________________________________________________;________________________________________________________;________________________________________________________;_____________________________O通常显______价H通常显______价Cl通常显______价练习题1.写出下列物质的化学式氢气________，氧气________，氮气________，氦气________水________，甲烷________，氨气________氧化镁________，氧化铝________，氧化钡________氧化亚铁________氧化铁________，硫酸________硝酸铜_______碳酸钙________，氢氧化钠________，氢氧化铁________，氢氧化亚铁________，氢氧化铜________氯化钠________，氯化钡________，氯化铵________，硫酸铝________，碳酸钠________，硝酸钾________，硫酸铵________2.计算下列加粗元素的化合价，并在相应的位置标注Cl2FeO3SH2SH2SO4NaNO3BaCO3CONH4NO3FeSO4Fe(NO3)3KMnO4K2MnO4Na2FeO4NaCdCl3 |
