无色晶体A易溶于水。将A在煤气灯上加热得到黄色固体B和棕色气体C。B溶于硝酸后又得A水溶液。碱性条件下A与次氯
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What factors are responsible for the difference in the properties of CO2and SiO2?
In the preparation of P4O6, why is a mixture of nitrogen and oxygen used rather than pure oxygen?
列出13,14,和15族的元素,并指出哪些是(a)双原子气体;(b)非金属;(c)准金属;(d)金属。
p区的轻元素常常与较重的元素在物理和化学性质方面有着不同。通过比较讨论下列各项的相同点和不同点