※ 引述《shiamuaoi (葵)》之銘言： : 寫考古時有幾題普化有問題 : 我把大概的想法寫上來討論 : 想麻煩板友們解惑看看我的觀念有沒有錯^^ : 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 : 這題我確定A一定錯，B應該是算出能量之後用E=ch/波長去算再對照， : 但其他兩個選項不知該如何判斷 degenerate是指能階相同的軌域,一般似H原子(電子組態跟H一樣的)的軌域只要主量 子數(n)相同，兩軌域的關係就是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，同樣條件下相同的體積有相同的分子數 : B 同樣溫度應該大家的動能都一樣？ 動能只跟溫度有關~ : C 應該是NH3，因為有氫鍵 應該說極性較強，有H-Bond就不會是氣體了~ : D PV/nRT是判斷跟理想氣體的差距的指標，methane比NH3接近理想氣體，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+ 是原本的電子組態扣掉4s兩個電子跟3d一個，CN是high spin Fe3+ 和 CN- 應該是 strong field吧，所以電子組態應該是t2g^5 eg^0 : B ......？ [n(n+2)]^1/2 = 磁矩 n=未成對電子數 : C、D hemoglobin是血紅素，但不知它的磁性跟所謂的d-d transiion 血紅素裡面含有Fe離子，d-d transition 還真的沒看過... : 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 ←我不知道要怎麼打那個符號... : (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 是鹼土金屬族那一排嗎？ : 我是選D，考慮的點是先填pi軌域(刪A.B)，然後先不填antibonding(刪D) : 題目有點多@@ : 請板友們相助了!! 這題要考的應該是雙元素分子電子組態的填入順序吧~ 題目2nd row可知是第二週期元素，由答案選項的電子數來看可得知是B2(6個價層電子) 一點淺見，有錯大家再討論吧~ --

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