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15.(12分)
(1)__ Ne ____
(2)___钠____ 、____铝_____
(3)___15_____,____30.97_____
(4)___A C____
(5)_每个铝离子带三个单位正电荷__
(6)___ Na+__________和_____Cl-________
(7)___A D__________
(8)___N___和 ___H___