※ 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应该是算出能量之后用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 ←我不知道要怎么打那个符号...
: (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 是碱土金属族那一排吗？
: 我是选D，考虑的点是先填pi轨域(删A.B)，然后先不填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~