abcdef是元素�期表中连续三个短�期的元素且原子序数依次增大a与d同主族bc同�期且相邻c的最外层电子数是次外层的3倍 Template




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tomskiabcdef是元素�期表中连续三个短�期的元素且原子序数依次增大a与d同主族bc同�期且相邻c的最外层电子数是次外层的3倍 coloring