英文版的1How are elements and compounds similar?How are they different?2What is the basic organizing feature of the periodic table of elements?3Explain how the law of definite proportions applies to compounds.4What type of compounds are compared

英文版的1How are elements and compounds similar?How are they different?2What is the basic organizing feature of the periodic table of elements?3Explain how the law of definite proportions applies to compounds.4What type of compounds are compared
英文版的
1How are elements and compounds similar?How are they different?
2What is the basic organizing feature of the periodic table of elements?
3Explain how the law of definite proportions applies to compounds.
4What type of compounds are compared in the law of multiple proportions?
5Name two elements that have properties similar to those of element potassium(K).To those of krypton(Kr).
6Complete the following table and then analyze the data to determin if compounds 1and 2 are the same compound.If the compounds are different,use the law of multiple proportions to show the relationship between them
analysis data of two iron compounds
Compound Tatol mass(g) Mass Fe(g) Mass O(g) Mass%Fe Mass%O
1 75.00 52.46 22.54
2 56.00 43.53 12.47
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英文版的1How are elements and compounds similar?How are they different?2What is the basic organizing feature of the periodic table of elements?3Explain how the law of definite proportions applies to compounds.4What type of compounds are compared
1.元素和化合物有哪些相似和不同?
A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number.A Chemical compound is a pure substance that is formed when atoms of two or more different elements combien and create a new material with properties completely unlike those of its constituent elements.They are both pure substances but elements consist of only one kind of atoms but compounds consist at least two different kinds.
元素是具有相同质子数的同一类原子的总称.化合物是两种或两种以上元素组成的纯净物.元素和化合物都是纯净物.但是元素是由同一种原子组成的而化合物是由至少两种不同原子组成的.
2.元素周期表的基本排布规律是什么?
There are 7 horizontal rows,called periods and 18 columns,called groups,in the periodic table.In each period,the atomic number of each element is increasing.Elements in the same group have similar chemical properties.
元素周期表有七个周期18个族.每个周期中元素的质子数从左到右递增.每个族中的元素化学性质相似.
3.解释如何将定比定律用到compound中?
The law of definite proportion states that different samples of a pure chemical substance always contain the same proportion of elements by mass.If there are two samples of the same compound,the proportion of masses of every elements in each of the two samples would be the same.
定比定律是说一个纯净物中每种元素的质量比是一定的.如果有同一种化合物的两个样本,那么这两个样本中,每种元素的质量比一定是相等的.
4.在倍比定律中,哪两种化合物被比较了?
CO and CO2
5.写出两个元素与钾性质相似,两个与氪性质相似的元素
和钾相似：Na,Ca
与氪相似：Ne,Ar
6.完成下表然后分析1和2 是不是同一种化合物.如果不是,请用倍比定律显示这两种物质的关系.
Compound Tatol mass(g) Mass Fe(g) Mass O(g) Mass%Fe Mass%O
1 75.00 52.46 22.54 70 30
2 56.00 43.53 12.47 78 22
These two compounds are different,because they have different proportion of the same elements by mass.
comparison:Fe:O mass ration in 1/(Fe:O mass ratio in 2)=77/117 which matches the conclusion from the Law fo multiple proportions wich means these two compounds are composed of same elements just in different ways.
这两个物质是不同的.但是由于元素质量比的比值是个简单整数比,我们可以知道这两种物质是由相同但是不同比例的元素组成的.

1,单质与化合物的相同点，不同点。
2，元素周期表中基本结排布规律是什么？
3，解释化合物为什么一定是均一的。
4，哪种化合物与混合物相似。
5，写出两个元素与钾性质相似,两个与氪性质相似的元素。
6。完成下表然后分析化合物1和化合物2是否为同一物质。如果不同，用混合物的规律来说明二者之间的关系。...

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1,单质与化合物的相同点，不同点。
2，元素周期表中基本结排布规律是什么？
3，解释化合物为什么一定是均一的。
4，哪种化合物与混合物相似。
5，写出两个元素与钾性质相似,两个与氪性质相似的元素。
6。完成下表然后分析化合物1和化合物2是否为同一物质。如果不同，用混合物的规律来说明二者之间的关系。

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