試題詳解

I. Choose one correct answer for the following questions 【單選題】每題 1 分，共計 60 分，答錯 1 題倒扣 0.25 分，倒扣至本大題零分為止，未作答，不給分亦不扣分。1. According to atomic theory:
(A) The nucleus is positively charged
(B) The nucleus contains both charged and uncharged particles
(C) The electrons contribute very little to the total mass of the atom
(D) The electrons are located in the atomic space outside the nucleus
(E) All of the above.