初三科学 写出符号及 化合价(通常)先写符号再写化合价.1.铵根. _____ . ______2.钙. _____. _____3.氧. _____. _____4.氢氧根. _____. _____5.镁.. _____. _____6.碳酸根. _____. _____7.铝. _____. _____8.硫酸根. _____. ___
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