如:
1、AB型;即离子个数为1:1型,为同一类型;一共2个微粒;
2、AB2 (或A2B)型;离子个数为1:2,或者2:1型,均为同一类型;一共3个微粒;
2、A2B3(或A3B2)型;离子个数为2:3或者3:2型,都为同一类型;一共5个微粒.
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