有哪些化学元素之最
化学元素之最有:宇宙中含量最多的元素是氢;地壳中含量最多的元素是氧,为百分之四十八点六;地壳中含360问答量最少的元素是砹,一共只有0.28克;地壳中含量最多的金属是铝,为百分之...
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化学元素怎么读
化学元素拼音:[huàxuéyuánsù]化学元素[释义]原子核中质子数相同,因而电荷数也相同的一类原子的总称。元素周期表注360问答音qīng氢hài氦lǐ锂pí铍péng硼t...
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化学元素F?
元素周期表上,越往右,越往上,非金属性(电负性)可以认为逐渐增强,也就是说右上角的F的电子的能力是最强的360问答(有一个,氟王的说法),价电子它要曾财席部起传是2s22p5,显...
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化学元素计算
因为在同温同压同体积时,这两种气体单质的物质的量也相同,而中子数之比为5:6,说明两种分子的中子数之比为5:6,而两种同位素O16和O18的中子数分别为8和10,可360问答以形...
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组成肽键的化学元素
组成肽键的化学元素一般是有4种氮元素,氢元素,碳元素和氧元素,就是这样的。
化学元素之最
1、最轻的元素:氢;2、在地球上存量最少的元素:砹;3、最重的元素:锇;4、最重的气体元素:氡;5、熔点最低的元素:来自氦;6、最高熔点的金属元素:钨;7、由最多同位360问答素...
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te是什么化学元素?
te是碲元素。碲元素是一种化学元素,化来自学符号是Te,原子序数是52,是银白色的类金属;碲的化学性质与硒及硫类似,主要用作合金及半导体。碲化铋用作热电装置中,碲-128及碲-1...
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oc是什么化学元素
oc是有机碳化学元素360问答。OC是废水中以碳计的有机物的含量,测试的指标常用TOC表示。水中的得有机物在高温,催化条件下,全想初部分解成碳,然后用载气中的氧结合生成二烟轻凯氧...
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si化学元素是什么?
si化学元素是硅。硅径(Silicon),是一种化学元素,化学符号是Si,旧称矽。原子序数14,相对原子质量28.0855,有无来自定形硅和晶体硅两种同素异形体,属于元素周期表上...
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se是什么化学元素
se是化学元素硒,是一种非金属元素,在化学元素周期表中兰川洲出财阶位于第四周期VIA族(第34号元素)。可以用作光敏材料、电解锰行业起于富催化剂、动物体必需的营养元素和督究船植物...
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cl是什么化学元素
cl是“氯”元素。氯是一种卤族尼吗引陈记径取冲房化学元素,位于元素周期表第三周期第VIIA族,化学符号为Cl,原子孔者执研首属序数为17。氯的物理性质的改变很有规律的,随着分子量...
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mg是什么化学元素
“mg”是镁化学元素,镁是一种金属元素,元素符号是Mg,英国戴维于1808年用钾还原氧化镁制得金属镁。它是一种银白色的轻质碱土金属,化学性质活泼,能与酸反应生成氢气,具有一定的延...
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化学元素sc怎么读?
钪(kang)是一种化学元素,元素符号是Sc,原子序数是21,是一种柔软、银白色的过渡金属,熔点154来自1℃,沸点*****。易溶于水,可与热水作用,在空气中容易变暗,主要化合...
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