gallium做关键词定位至倒数第三句，但这句话只是说命名为GA，没说支持什么，往下看说GA的发现支持了元素周期律，而问题刚好是问GA的发现支持了什么，所以答案是C，元素周期表的组成规律，也就是元素周期律。
Elementsin the periodic table are arrangedin order of increasing atomicnumber and placed in vertical columns (groups)andhorizontalrows(periods). .The elements across the periods show repeating patterns inchemical and physical properties. This is called periodicity. 周期表中的元素按原子序数增加的顺序排列...
4. The Periodic Table consists of elements arranged in order of increasing atomic number(a) (i) What is meant by the term atomic number?(1) A the number of neutrons in an atom□ B the number of protons in an atom□ C the number of protons plus the number of electrons in an atom□...
Development of the Periodic Table The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of i…
托福阅读句子插入题:the Periodic Table 【Paragraph1】The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number (the number of protons in the nucleus). It is a monument...
A6 In the modern Periodic Table, elements are arranged in the order of increasing proton numbers. A student tried to re-arrange the elements in the order o Increasing relative atomic masses and got nearly the same arrangement.However, the elements, argon and potassium would have their positions...
The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number(the number of protons in the nucleus). It is a monumental scientific achievement, and its development illustrate...
He arranged them in groups of three in increasing order of atomic weight and called them triads,observing that some properties of the middle element, such as atomic weight and density, approximated the average value of these properties in the other two in each triad. A breakthrough came with ...
The most commonly used form of the modern periodic table, sometimes called the long form, in which the elements are arranged in seven horizontal rows in order of increasing atomic number. Each element is identified by its symbol placed...
The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number (the number of protons in the nucleus). It is a monumental scientific achievement, and its development illustra...