英语翻译Group IVA consists of a nonmetal,carbon,two metalloids,silicon and germanium,and two metals,tin and lead.Each of these elements forms some compounds with formulas which indicate that four other atoms are present per group IVA atom,as,for

英语翻译Group IVA consists of a nonmetal,carbon,two metalloids,silicon and germanium,and two metals,tin and lead.Each of these elements forms some compounds with formulas which indicate that four other atoms are present per group IVA atom,as,for
英语翻译
Group IVA consists of a nonmetal,carbon,two metalloids,silicon and germanium,and two metals,tin and lead.Each of these elements forms some compounds with formulas which indicate that four other atoms are present per group IVA atom,as,for example,carbon tetrachloride,GCl4.The group IVB metals —titanium,zirconium,and hafnium —also forms compounds in which each group IVB atom is combined with four other atoms; these compounds are nonelectrolytes when pure.
The elements of group V A include three nonmetals — nitrogen,phosphorus,and arsenic—and two metals — antimony and bismuth.Although compounds with the formulas N2O5,PCl5,and AsCl5 exist,none of them is ionic.These elements do form compounds-nitrides,phosphides,and arsenides — in which ions having charges of minus three occur.The elements of group VB are all metals.These elements form such a variety of different compounds that their characteristics are not easily generalized.
With the exception of polonium,the elements of group VIA are typical nonmetals.They are sometimes known,as the,chalcogens,from the Greek word meaning "ash formers".In their binary compounds with metals they exist as ions having a charge of 2-.The elements of group ⅦA are all nonmetals and are known as the halogens.from the Greek term meaning "salt formers.” They are the most reactive nonmetals and are capable of reacting with practically all the metals and with most nonmetals,including each other.
The elements of groups ⅥB,ⅦB,and VIIIB are all metals.They form such a wide Variety of compounds that it is not practical at this point to present any examples as being typical of the behavior of the respective groups.
The periodicity of chemical behavior is illustrated by the fact that.excluding the first period,each period begins with a very reactive metal.Successive element along the period show decreasing metallic character,eventually becoming nonmetals,and finally,in group ⅦA,a very reactive nonmetal is found.Each period ends with a member of the noble gas family.

英语翻译Group IVA consists of a nonmetal,carbon,two metalloids,silicon and germanium,and two metals,tin and lead.Each of these elements forms some compounds with formulas which indicate that four other atoms are present per group IVA atom,as,for
Group IVA consists of a nonmetal, carbon, two metalloids, silicon and germanium, and two metals, tin and lead. Each of these elements forms some compounds with formulas which indicate that four other atoms are present per group IVA atom, as, for example, carbon tetrachloride, GCl4. The group IVB metals —titanium, zirconium, and hafnium —also forms compounds in which each group IVB atom is combined with four other atoms; these compounds are nonelectrolytes when pure.
第四主族包括非金属碳、两种半金属硅和锗、两种金属锡和铅.这些元素可以和其它元素形成一些一比四的化合物,例如,四氯化碳CCl4.第四副族金属钛、锆、铪在形成化合物时,同样是每个原子与四个其它原子结合.这些化合物在纯态时为非电解质.
The elements of group V A include three nonmetals — nitrogen, phosphorus, and arsenic—and two metals — antimony and bismuth. Although compounds with the formulas N2O5, PCl5, and AsCl5 exist, none of them is ionic. These elements do form compounds-nitrides, phosphides, and arsenides — in which ions having charges of minus three occur. The elements of group VB are all metals. These elements form such a variety of different compounds that their characteristics are not easily generalized.
第五主族包括三种非金属---氮磷砷,两种金属锑和铋.N2O5, PCl5, AsCl5这样的化合物虽然存在,但它们都不是离子化合物.氮磷砷容易形成的是氮化物、磷化物和砷化物,在这些化合物中,氮磷砷均呈现为负三价离子.第五副族均为金属元素,它们形成的化合物极为庞杂,其性质难以简单归纳.
With the exception of polonium, the elements of group VIA are typical nonmetals. They are sometimes known, as the, chalcogens, from the Greek word meaning "ash formers". In their binary compounds with metals they exist as ions having a charge of 2-. The elements of group ⅦA are all nonmetals and are known as the halogens. from the Greek term meaning "salt formers.” They are the most reactive nonmetals and are capable of reacting with practically all the metals and with most nonmetals, including each other.
The elements of groups ⅥB, ⅦB, and VIIIB are all metals. They form such a wide Variety of compounds that it is not practical at this point to present any examples as being typical of the behavior of the respective groups.
除了钋以外,第六主族的元素都是典型的非金属.有时它们也可称为硫属元素（chalcogens）,chalcogens这个词来源于希腊语“可以形成灰的东西”.在与金属的二元化合物中,它们以负二价离子的形式存在.第七主族的元素均为非金属,也称为卤素（Halogens）.Halogens一词来源于希腊语“可以形成盐的东西”.它们是最活泼的非金属,可以和所有金属以及大部分非金属反应.卤素之间也可相互反应.第六、七、八副族元素均为金属.它们形成的化合物也极为庞杂,在本书目前阶段想要提出一些典型实例来说明各族的性质是不切实际的.
The periodicity of chemical behavior is illustrated by the fact that. excluding the first period, each period begins with a very reactive metal. Successive element along the period show decreasing metallic character, eventually becoming nonmetals, and finally, in group ⅦA, a very reactive nonmetal is found. Each period ends with a member of the noble gas family.
元素化学性质的周期性可说明如下：除第一周期外,每一周期都以很活泼的金属开始,沿着该周期向右元素的金属性逐步减弱,到后来就变为非金属,最终我们在周期表上看到的是第七主族的活泼非金属.每一周期最末尾的元素构成了稀有气体族.