divalent element 二价元素 ; 二阶元素
divalent metal [化学] 二价金属 ; 二阶金属
Iron Divalent 二价铁
divalent alcohol 二元醇
divalent ion 二价离子
divalent system 二变系
divalent ions 价离子 ; 而双价离子
divalent radical 二阶基 ; 二价基
divalent cation 二价阳离子
ADJ having a valency of two 二价的 [chem]
Hardness is caused by divalent metallic cations.
硬度是由一些两价金属阳离子引起的。
Heats of hydration of divalent transition metal cations.
元素离子水化热等。
The possibilities of formation of complex compound between divalent iodates have been studied.
对二价碘酸盐之间形成复盐的可能性也进行了探讨。
It's 109 . 5 is what we would expect for methane because it's tetravalent, but here we're just seeing something that's divalent, and they're both in p orbitals that are perpendicular to each other.
因为甲烷是四价的,我们预测是109。,但这里我们,看到的是二价的,它们都在。
So this should immediately look like a problem because we know, in fact, that methane is tetravalent, and this is telling us it's only divalent.
显然这看起来是一个问题,因为我们知道实际上,甲烷是四价的,而这告诉我们它仅仅是二价的。
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