本题目来源于试卷: Models of Matter A.2 The Nuclear Atom，类别为 IB化学
[单选题]
The nuclear symbol for an isotope of iodine is$^{125}_{53}$.Which of the following is correct?
A. Atomic Number is 53, Mass Number is 125,Number of protons is 53,Number of neutrons is 72,Number of electrons is 53
B. Atomic Number is 53, Mass Number is 125,Number of protons is 72,Number of neutrons is 53,Number of electrons is 53
C. Atomic Number is 125, Mass Number is 53,Number of protons is 53,Number of neutrons is 72,Number of electrons is 72
D. Atomic Number is 125, Mass Number is 53,Number of protons is 53,Number of neutrons is 53,Number of electrons is 72
参考答案: A
本题详细解析:
 The mass number is the sum of the number of protons and neutrons. For a neutral atom, the number of electrons is equal to the number of protons.
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