21.
Bohrs radius for H-atom(n=1) is approximately0.53Ao. The radius of the first excited (n=2) is;
A
0.13 Ao
B
1.06Ao,
C
4.77Ao
D
2.12Ao
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Bohrs radius for H-atom(n=1) is approximately0.53Ao. The radius of the first excited (n=2) is;
0.13 Ao
1.06Ao,
4.77Ao
2.12Ao
The total number of orbitals in a shell having principle quantum number n is;
2n
n2
2n2
(n+l)
Which of the following orbitals has dumb-bell shape
s
p
d
f
The electronic configuration of Cu+2 ion is;
[Ar} 4s1 3d8
[Ar] 4s1 3d10
[Ar] 4s2 3d10 4p1
[Ar] 3d9
The configuration 1s2, 2s2, 2p5, 3s1 shows
Ground state of fluorine
Excited state of neon
Excited state of fluorine
Excited state of - ion
The number of spherical nodes for 4d orbital is
Zero
Two
One
Three
Which expression represents de-Broglie relationship?
h/mv = ρ
λ= h/mρ
h/mv = λ
mλ = v/ρ
A g-sub shell is characterized by
n=5
m=3
l= 4
l= 5
Which of the following atoms or ion/atom have identical ground state configuration?
Li+ and He+
Na and K
Cl- and Ar
F+ and Ne
For which of the following set of quantum numbers, an electron will have the highest energy?
3, 2, +1, +1/2
4, 1, 0, -1/2
4, 2, -1, +1/2
5, 0, 0, +1/2