“等电子体”微粒在近几年高考中频繁出现,10e~-、18e~-微粒我们已经比较熟悉了,但14e~-微粒也是一个隐蔽型的考点,现归纳如下:核外电子数为14电子的原子只有Si原子,可形成原子晶体;以此为基点进行思维发散:14电子的一半即7电子原子为N原子,可组成N_2;又因7+7=6+8,可以推出CO分子;再由CO可推出Li_2O、C_2~(2-)。 In recent years college entrance examination often appear, 10e ~ -, 18e ~ - we have more familiar with the particles, but 14e ~ - particles are also a hidden test sites, are summarized as follows: the nuclear The number of 14 electronic atoms only Si atoms, atomic crystals can be formed; this as the starting point for thinking divergent: half of the electrons that seven electronic atoms to N atoms, can be composed of N_2; and 7 +7 = 6 +8, you can Launched CO molecules; then launched by the CO Li_2O, C_2 ~ (2-).