磷者,一作燐,化學元素也,符號P,原子序十五,屬非金屬。
與氮同族,色或紅、或黑、或紫、或銀白,性燥、有毒。可製安全火柴、煙花、燃燒彈、化肥。
其色或紅、或黑、或紫、或銀白,何為?因其構異矣,此謂同素異形體。
其同位素有十三,自磷廿七迄磷卅九,性穩者獨磷卅一,餘者皆不安,常衰變而不存矣。
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