The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?
Li2+ (n = 2)
Li2+ (n = 3)
Be3+ (n = 2)
He+ ( n = 2)
Which of the following set of quantum numbers represents the highest energy of an atom?
n =3, l=2, m=1, s= +1/2
n=4, l=0, m=0, s= -1/2
n=3, l=0, m=4, s= +1/2
n=3, l=1, m=1, s=+1/2
Which of the following electron has minimum energy?
n = 4; l = 0; m= 0; s = +
n= 4; l= 1; m = ±1; s = +
n = 5; l = 0; m = 0; s = +
n = 3; l = 2; m = -2; s = +
How many emission spectral lines are possible when hydrogen atom is excited to nth energy level?
Which of the following corresponds to the energy of the possible excited state of hydrogen?
-13.6 eV
13.6 eV
-3.4 eV
3.4 eV
C.
-3.4 eV
The different energy levels of an atoms are given by the equation En = -13.6 Z2/ n2eV.
Z is the atomic number for hydrogen = 1, n =1,2,3 and so on such that the ground state has n = 1 and the secondary energy level (first excited state) has n = 2
So, for first excited state, n = 2.
E =-13.6/ 22 = -13.6/4 = -3.4 eV
The correct order of the spin only magnetic moment of metal ions in the following low spin complexes, [V(CN)6]4-, [Fe(CN)6]4-, [Ru(NH3)6]3+ and [Cr(NH3)6]2+ is
V2+ > Cr2+ > Ru3+ > Fe2+
V2+ > Ru3+ > Cr2+ > Fe2+
Cr2+ > V2+ > Ru3+ > Fe2+
Cr2+ > Ru3+ > Fe2+ > V2+
Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is represented by a0).
The electron can be found at a distance 2a0 from the nucleus.
The probability density of finding the electron is maximum at the nucleus.
The total energy of the electron is maximum when it is at a distance a0 from the nucleus.
The magnitude of the potential energy is double that of its kinetic energy on a an average.