本题目来源于试卷: Classification of Matter A.1 Periodic Table Elements Classification，类别为 IB化学
[单选题]
Atom X is an isotope of an alkali me r-yp r p5 2huqx5x0v)rtal. Wh e6hsg4j:/l w (,iutcl ich of the following is a possible symbol for atom leltiuh/ 4:c,6 (sgwj X?'
A.
B.
C.
D.
参考答案: D
本题详细解析:
Explanation: The group of an element is determined by its atomic number, which is found in the lower left corner of the element symbol. Although this conflicts with the representation in the data booklet, students should be able to differentiate between the mass and atomic number based on their relative size. The elements represented by options A, B, C and D are calcium (an alkaline earth metal), iron (a transition metal), gallium (a poor / p block metal) and rubidium (an alkali metal), respectively. This question is moderately difficult as the student must identify the correct value from the given symbol and relate it to the position of an element in the periodic table.
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