作者riance (小羊)
看板TransBioChem
标题Re: [普化] The particle in a box 的问题
时间Tue Apr 5 13:02:51 2005
※ 引述《appleM (天空不要为我掉眼泪)》之铭言:
: 我 还是有点弄不懂 "The particle in a box"
: 像是下面的两个题目 我不太清楚在问什麽
: 希望有人可以告诉我
: For a particle in a cubic box, how many degenerate energy levels have
: energy equal to 14h^2/8mL, in which L s the lenth of the cubic box.
: (a)1 (b)2 (c)6 (d)8 (e)12
En=(nx^2+ny^2+nz^2)h^2/8mL^2
nx,ny,nz 可以是(1,2,3) 再去排列组合一下 有6个 选c
: (a)Discuss what happens to the energy levels for an eletron trapped in a
: one-dimensional box as the length of the box increases.
能量会降低 根据En=n^2h^2/8mL^2 L变大En会下降
: (b)Which has the lowest(ground-state) energy, an eletron trapped in a one-
: dimensional box of the length 10^(-5) or one with length 10^(-10)?
直接带进去上面那个En的公式 基态的话n代1
所以说10^-5的基态能量会比较小
: -------------------
: 另外还有一题 我不太清楚题意
: What is the maximum number of electron in an atom that can have the
: quantum number of n=3, l=2?
: n=3, l=2 指的是 3d轨域
: 题目的意思是说3d轨愈能容纳多少电子吗? (10个)
: 还是说有3d轨域的原子总共可以容纳多少电子? (1s2s2p3s3p4s3d, 30个)
我觉得应该是total吧
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◆ From: 59.104.201.224
1F:推 fierybear:最後一题我也赞成total218.171.213.175 04/05
2F:推 appleM:我也这麽觉得 可是选项只有36,18,10,25220.138.237.169 04/05
3F:→ appleM:所以我在想是不是指3d轨域220.138.237.169 04/05
4F:推 wilson1000:3d啦 218.166.59.168 04/06