题目

在核电荷数为26的元素Fe的原子核外3d、4s 轨道内，下列电子排布图正确的是（） A.                     B.C.                      D. 答案：【答案】C 【解析】 【分析】 核电荷数为26的元素Fe的原子核外电子排布式为：1s22s22p63s23p63d64s2，根据能量最低原理、泡利原理、洪特规则，可以写出该原子的核外电子轨道表示式。 【详解】A. 4s轨道能量小于3d，该表示式违反了能量最低原理，A错误； B. 该表示式违反了洪特规则（电子在原子核外排布从Ⅱ栏中找出与Ⅰ栏内词语意义相近的解释． Ⅰ 1．calendar(　　) 2．invitation(　　) 3．match(　　) 4．whole(　　) 5．tomorrow(　　) 6．lesson(　　) 7．visit(　　) 8．much(　　) 9．sorry(　　) 10．doctor(　　) 　 　 Ⅱ A．a table that lists the days, weeks, and months of the year B．a game or sports event where teams or people compete C．a written or spoken request made to someone, asking them to come to a place, take part in activities, etc. D．all; the full amount of E．feeling sadness or pity F．to go and spend time in a place or with someone G．a lot of, a large amount of H．the day following today I．class in school J．a person whose profession is to treat sick people