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单选题 Owing to their electron structure, the noble gases have some special character's as ()

A. all the noble gases exist in the atmosphere, but they are all rare

B. because of their reactivity, the noble gases don't undergo reactions and all exist in monatomic states

C. because of their stability, the compounds of noble gases would hardly be formed by chemical reaction

D. because of their tiny portion of the atmosphere, the noble gases can't be concentrated by special container

科技文献与专业英语课程封面

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时间：2024-11-18 13:55:18

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题目1
单选题
From the first paragraph, we can get information about the periodic table except ()
A. the periodic table is very useful in tabulating information about atomsB. the periodic table can tell us the number of protons and electrons of each elements containC. the periodic table records how many neutrons in the atoms directlyD. the periodic table implicated the information of the electrons' arrangement in the atoms
题目2
单选题
We can infer from the passage that the periodic table ()
A. is first presented by Dmitri Ivanovich MendeleevB. is arranged the list of elements only according to their atomic weightsC. comprises more than to elements at first timeD. is placed two similar elements every seven elements
题目3
单选题
According to the passage, which is true among the following sentences
A. In Mendeleev's periodic table, the lighter element was placed before a heavier oneB. Mendeleev had made many valuable predictions of the undiscovered elementsC. The properties of an element were determined by the number of the electrons in the outer energy level of the atomD. According to the periodic table, the sodium and telluri um have similar chemical properties
题目4
单选题
From Mendeleev's periodic table, we can conclude that ()
A. the elements'arrangement brought to light the periodicity of chemical propertiesB. the number of electrons determined the element's chemical properties and the number of protons determined the order of the periodic tableC. Mendeleev's table arranged in order of the same rules as the modern tableD. the atomic number is also increasing with the atomic weight
题目5
单选题
Which sentence best states the modern periodic table
A. In modern table, each period includes elements with the same number of electrons in their outermost energy levelsB. In one group, elements have similar chemical properties and the same electron energy levelsC. The size of atoms and the activity of electrons can be predicted with the number of the element's periodD. In the modern table, the activity of the atoms is increasing from left to right
题目6
单选题
Owing to their electron structure, the noble gases have some special character's as ()
A. all the noble gases exist in the atmosphere, but they are all rareB. because of their reactivity, the noble gases don't undergo reactions and all exist in monatomic statesC. because of their stability, the compounds of noble gases would hardly be formed by chemical reactionD. because of their tiny portion of the atmosphere, the noble gases can't be concentrated by special container
题目7
单选题
The noble gases share a similarity in certain properties. for example ()
A. helium is the most useful noble gas and can take the place of hydrogen in all aspectsB. Helium, argon and neon have the same number of electrons in their outermost energyC. All of the noble gases are unreactive in chemical reactions readilyD. krypton and xenon have no important commercial applications
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