问题描述：
英语翻译
Each horizontal row of elements constitutes a period.It should be noted that the lengths of the periods vary.There is a very short period containing only 2 elements,followed by two short periods of 8 elements each,and then two long periods of 18 elements each.The next period includes 32 elements,and the last period is apparently incomplete.With this arrangement,elements in the same vertical column have similar characteristics.These columns constitute the chemical families or groups.The groups headed by the members of the two 8-element periods are designated as main group elements,and the members of the other groups are called transition or inner transition elements.
In the periodic table,a heavy stepped line divides the elements into metals and nonmetals.Elements to the left of this line (with the exception of hydrogen) are metals,while those to the right are nonmetals.This division is for convenience only; elements bordering the line—the metalloids-have properties characteristic of - both metals and nonmetals.It may be seen that most of the elements,including all the transition and inner transition elements,are metals.
Except for hydrogen,a gas,the elements of group IA make up the alkali metal family.They are very reactive metals,and they are never found in the elemental state in nature.However,their compounds are widespread.All the members of the alkali metal family,form ions having a charge of 1+ only.In contrast,the elements of group IB —copper,silver,and gold—are comparatively inert.They are similar to the alkali metals in that they exist as 1+ ions in many of their compounds.However,as is characteristic of most transition elements,they form ions having other charges as well.
The elements of group IIA are known as the alkaline earth metals.Their characteristic ionic charge is 2+.These metals,particularly the last two members of the group,are almost as reactive as the alkali metals.The group IIB elements—zinc,cadmium,and mercury are less reactive than are those of group II A5,but are more reactive than the neighboring elements of group IB.The characteristic charge on their ions is also 2+.
With the exception of boron,group IIIA elements are also fairly reactive metals.Aluminum appears to be inert toward reaction with air,but this behavior stems from the fact that the metal forms a thin,invisible film of aluminum oxide on the surface,which protects the bulk of the metal from further oxidation.The metals of group IIIA form ions of 3+ charge.Group IIIB consists of the metals scandium,yttrium,lanthanum,and actinium.
希望今天不会让俺太失望,不要google的翻译哦!
1楼的是google翻译来的
Each horizontal row of elements constitutes a period.It should be noted that the lengths of the periods vary.There is a very short period containing only 2 elements,followed by two short periods of 8 elements each,and then two long periods of 18 elements each.The next period includes 32 elements,and the last period is apparently incomplete.With this arrangement,elements in the same vertical column have similar characteristics.These columns constitute the chemical families or groups.The groups headed by the members of the two 8-element periods are designated as main group elements,and the members of the other groups are called transition or inner transition elements.
In the periodic table,a heavy stepped line divides the elements into metals and nonmetals.Elements to the left of this line (with the exception of hydrogen) are metals,while those to the right are nonmetals.This division is for convenience only; elements bordering the line—the metalloids-have properties characteristic of - both metals and nonmetals.It may be seen that most of the elements,including all the transition and inner transition elements,are metals.
Except for hydrogen,a gas,the elements of group IA make up the alkali metal family.They are very reactive metals,and they are never found in the elemental state in nature.However,their compounds are widespread.All the members of the alkali metal family,form ions having a charge of 1+ only.In contrast,the elements of group IB —copper,silver,and gold—are comparatively inert.They are similar to the alkali metals in that they exist as 1+ ions in many of their compounds.However,as is characteristic of most transition elements,they form ions having other charges as well.
The elements of group IIA are known as the alkaline earth metals.Their characteristic ionic charge is 2+.These metals,particularly the last two members of the group,are almost as reactive as the alkali metals.The group IIB elements—zinc,cadmium,and mercury are less reactive than are those of group II A5,but are more reactive than the neighboring elements of group IB.The characteristic charge on their ions is also 2+.
With the exception of boron,group IIIA elements are also fairly reactive metals.Aluminum appears to be inert toward reaction with air,but this behavior stems from the fact that the metal forms a thin,invisible film of aluminum oxide on the surface,which protects the bulk of the metal from further oxidation.The metals of group IIIA form ions of 3+ charge.Group IIIB consists of the metals scandium,yttrium,lanthanum,and actinium.
希望今天不会让俺太失望,不要google的翻译哦!
1楼的是google翻译来的
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