[化學] 能階與氫原子
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
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？
C 應該是NH3，因為有氫鍵
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
B ......？
C、D hemoglobin是血紅素，但不知它的磁性跟所謂的d-d transiion
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!!
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05/29 06:01, , 1F
05/29 06:01, 1F
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