0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following is/are correct energy order for H-atom?
  1. 1s < 2s < 2p < 3s < 3p
  2. 1s < 2s < 4s < 3d
  3. 1s < 2s = 2p < 3s = 3p
  4. 1s < 2p < 3d < 4s

A
1s < 2p < 3d < 4s
B
1s < 2s = 2p < 3s = 3p
C
1s < 2s < 2p < 3s < 3p
D
1s < 2s < 4s < 3d
Solution
Verified by Toppr

Energy of orbital of hydrogen depends upon n+l rule. For,

1s: n+l=1
2s: n+l=2
2p: n+l=3
3s: n+l=3
3p: n+l=4
3d: n+l=5
4s: n+l=4
Hence, energy order is 1s<2s<2p<3s<3p<4s<3d.

Therefore, option A and D are correct.

Was this answer helpful?
2
Similar Questions
Q1
A series of orbitals are given below. Identify the sets which represent the correct order of filling up of orbitals.
(A) 3s, 3p, 3d, 4s, 4p
(B) 4s, 4p, 5s, 4d, 5p, 4f
(C) 2s, 2p, 3s, 3p, 4s, 3d, 4p
(D) 1s, 2s, 2p, 3s, 3p, 3d
View Solution
Q2

For multi electron system, the energies goes like

1s < 2s < 2p < 3s < 4s < 3d . . . . . .


View Solution
Q3
Group the following electronic configurations in pairs that would have different chemical properties of their atoms
(a) 1s2,2s2,2p5
(b) 1s2,2s1
(c) 1s2,2s2,2p6
(d)1s2,2s2,2p6,3s2,3p5
(e) 1s2,2s2,2p6,3s2,3p6,4s1
(f) 1s2,2s2,2p6,3s23p6,4s2,3d10,4p6
View Solution
Q4
The electronic configuration of the following elements K19, Mn25, Ca20 are given.

K19 = 1s2 2s2 2p6 3s2 3p6 4sx
Mn25 = 1s2 2s2 2p6 3s2 3p6 3d5 4sy
Ca20 = 1s2 2s2 2p6 3s2 3p6 4sz

The product of x, y, and z is:
View Solution
Q5
The excepted ground state configuration for Cu is:
1s22s22p63s23p64s23d9
The actual configuration is:
1s22s22p63s23p64s13d10
Why is the true electron configuration different?
View Solution