1. Basic Chemistry
... of zero to four. Elements are divided into families depending on their physical and chemical properties. These families are grouped on the periodic table according to horizontal rows with preceding roman numerals. The first family contains only one element, hydrogen. Because hydrogen, the simplest atom has only one atom, it can act like both Alkali metals (which have one outer electron) or ... according to the number of oxygen atoms and their oxidation numbers. Atoms that have multiple oxidation numbers must also be named according to the Stock system. The stock system places roman nume...
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