Re: [化學] 能階與氫原子
※ 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~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 1.165.69.184
討論串 (同標題文章)