那么，我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么，负一价的氟离子就是与它等电子的，我们还有氧-,氧应该是几价的？
So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be?
因为铝离子为正三价,氧为负二价。
Because aluminum ions have charge of plus three and oxygen ions have charge of minus two.
硅原子占据了氧原子之间的空隙并且和四个氧原子共用化合价。
The silicon atom occupies the space opening( interstice)between the oxygen atoms and shares four valence electrons with the four oxygen atoms.
结果表明，氧脱木素桦木硫酸盐浆臭氧漂白期间氧碳比逐渐增加，碳价态发生了显著变化。
The results showed that oxygen to carbon atomic ratios gradually increased and the valence states of carbon markedly changed during the ozone bleaching of oxygen-delignified birch kraft pulp.
血液和脑实质能产生超氧负离子，这大概与血液分解产物包括三价铁有关。
Both blood and brain parenchyma have been shown to generate superoxide anion, probably related to blood breakdown products including ferric iron.
式(1)中，R1表示苄基或苯氧甲基。M表示一价的阳离子。
In the formula (1), R1 represents benzyl group or phenoxy methyl and m represents monovalent cation.
式(1)中，R1表示苄基或苯氧甲基。M表示一价的阳离子。
In the formula (1), R1 represents benzyl group or phenoxy methyl and m represents monovalent cation.
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