※ 引述《shiamuaoi (葵)》之铭言： : 写考古时有几题普化有问题 : 我把大概的想法写上来讨论 : 想麻烦板友们解惑看看我的观念有没有错^^ : 1.Which of the following regarding to the electronic states in hydrogen atom : is correct? : (A)the electron in the state of n=2 may be closer to the nucleus than in 1 : (B)to ionize the electron from n=3 needs the UV light : (C)the orbitals beyond n=1 are all degenerate : (D)the hydrogen molecule will have two degenerate states for each principal : quantum number n : 这题我确定A一定错，B应该是算出能量之後用E=ch/波长去算再对照， : 但其他两个选项不知该如何判断 degenerate是指能阶相同的轨域,一般似H原子(电子组态跟H一样的)的轨域只要主量 子数(n)相同，两轨域的关系就是degenerate : 2.At 25度C and 1 atm, four containers of 1.0 L are respectively filled with H2, : CH4, NH3, and O2, which of the following statements regarding these four : gases is correct? : (A)four containers have the same number of molecules : (B)H2 has the largest kinetic energy : (C)O2 strays away most from the ideal gas behavior : (D)methane and ammonia have the closest values of PV/nRT : 我的答案是A，同样条件下相同的体积有相同的分子数 : B 同样温度应该大家的动能都一样？ 动能只跟温度有关~ : C 应该是NH3，因为有氢键 应该说极性较强，有H-Bond就不会是气体了~ : D PV/nRT是判断跟理想气体的差距的指标，methane比NH3接近理想气体，值不是最近的 : 3.Which of the following statements regarding transition metal compound is : correct? : (A)the electronic configuration of iron in Fe(CN)6^3- is t2g^3 eg^2 : (B)the magnetic moments of paramagnetic Fe(H2O)6^3+ is about (35)^1/2 : (C)the blood is consisted of hemoglobin, so the blood is paramagnetic : (D)the major absorbance wavelength for the d-d transition in heme os longer : than 500nm : 我的答案是A，Fe3+ 是原本的电子组态扣掉4s两个电子跟3d一个，CN是high spin Fe3+ 和 CN- 应该是 strong field吧，所以电子组态应该是t2g^5 eg^0 : B ......？ [n(n+2)]^1/2 = 磁矩 n=未成对电子数 : C、D hemoglobin是血红素，但不知它的磁性跟所谓的d-d transiion 血红素里面含有Fe离子，d-d transition 还真的没看过... : 4.Which of the following electronic configuration is of the ground state of X2 : wherein X belons to the elements of the 2nd row : (A)(alpha 2s)^2 (a 2s*)^2 (a 2p)^1 (pi 2p)^1 ←我不知道要怎麽打那个符号... : (B)(a 2s)^2 (a 2s*)^2 (a 2p)^1 (pi 2p*)^1 : (C)(a 2s)^2 (a 2s*)^2 (pi 2p)^1 (pi 2p*)^1 : (D)(a 2s)^2 (a 2s*)^2 (pi 2p)^2 (pi 2p*)^0 : 2nd row 是硷土金属族那一排吗？ : 我是选D，考虑的点是先填pi轨域(删A.B)，然後先不填antibonding(删D) : 题目有点多@@ : 请板友们相助了!! 这题要考的应该是双元素分子电子组态的填入顺序吧~ 题目2nd row可知是第二周期元素，由答案选项的电子数来看可得知是B2(6个价层电子) 一点浅见，有错大家再讨论吧~ --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 1.165.69.184