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可能用到的数据原子量H 1 c12 N 1 4 O 1 6 Mg 24 s 32 C】35.5 Ca 40 Ag 1 08 一、选择题(每小题1分,共10分。每小题只有一个选项符合题意。)将每题所选项前的标号(A、B、c、D)填人题后括号内。 .1.设某元素某原子核内的质子数为m,中子数为n,则下述论断正确的是 (A)不能由此确定该元素的原子量 (B)这种元素的原子量为m+n (c)若碳原子质量为Ⅲ克,此原子的质量为(m+n)Ⅲ克 (D)核内中子的总质量小于质子的总质量【A】 2.碳化硅(sic)的一种晶体具有类似金刚石的结构,其中碳原子和硅原子的位置是交替
Possible atomic weight of data H 1 c12 N 1 4 O 1 6 Mg 24 s 32 C 35.5 Ca 40 Ag 1 08 1. Multiple choice questions (1 point for each question, total 10 points. There is only one option for each question Indicate that the labels (A, B, c, and D) before each question are filled in parentheses. .1. Let the number of protons in a certain nucleus of an element be m and the number of neutrons be n. Then the following statement is correct: (A) The atomic weight of the element cannot be determined from it (B) The atomic weight of this element is m+ n (c) If the carbon atom mass is III g, the mass of this atom is (m+n) III g (D) The total mass of neutrons in the core is smaller than the total mass of protons [A] 2. Silicon carbide (SiC) A crystal has a diamond-like structure in which the positions of carbon atoms and silicon atoms alternate