A:Na+的基态电子排布图是:
B:H2O分子的电子式为:
C:Ca2+离子基态电子排布式为:1s22s22p63s23p6
D:氯原子结构示意图为:
看图片,写单词。
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—First I did my homework, and then I played piano for half hour.
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