Quantum numbers

Which of the following is correct set of 4 quantum numbers of 19th electron in Chromium (Atomic number = 24) in accordance with Aufbau principle?

Arrange the following atomic orbitals of multi electron atoms in order of increasing energy.

A. $n=3$, $l=2$, $m=+1$

B. $n=4$, $l=0$, $m=0$

C. $n=6$, $l=1$, $m=0$

D. $n=5$, $l=1$, $m=+1$

E. $n=2$, $l=1$, $m=+1$

Choose the correct answer from the options given below:

Which of the following statement(s) is/are true ?

A. If two orbitals have the same value of $(n+l)$, the orbital with lower value of n will have lower energy.

B. Energies of the orbitals in the same subshell increase with increase in atomic number.

C. The size of $2p_x$ orbital is less than the size of $3p_x$ orbital.

D. Among 5f, 6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes.

Choose the correct answer from the options given below :

Consider the following pairs of electrons

(A) (a) $n=3,\ l=1,\ m_l=1,\ m_s=+\frac12$

(b) $n=3,\ l=2,\ m_l=1,\ m_s=+\frac12$

(B) (a) $n=3,\ l=2,\ m_l=-2,\ m_s=-\frac12$

(b) $n=3,\ l=2,\ m_l=-1,\ m_s=-\frac12$

(C) (a) $n=4,\ l=2,\ m_l=2,\ m_s=+\frac12$

(b) $n=3,\ l=2,\ m_l=2,\ m_s=+\frac12$

The pairs of electrons present in degenerate orbitals is/are :

The number of radial and angular nodes in 4d orbital are, respectively

Consider the following set of quantum numbers.

	n	l	$m_l$
A.	3	3	−3
B.	3	2	−2
C.	2	1	+1
D.	2	2	+2

The number of correct sets of quantum numbers is ______.

Consider the following statements :

(A) The principal quantum number 'n' is a positive integer with values of 'n' = 1, 2, 3, ...

(B) The azimuthal quantum number '$l$' for a given 'n' (principal quantum number) can have values as '$l$' = 0, 1, 2, .... n

(C) Magnetic orbital quantum number '$m_l$' for a particular '$l$' (azimuthal quantum number) has $(2l+1)$ values.

(D) $\pm1/2$ are the two possible orientations of electron spin.

(E) For $l=5$, there will be a total of 9 orbital

Which of the above statements are correct ?

Which of the following statements are correct ?

(A) The electronic configuration of Cr is [Ar] 3d$^5$ 4s$^1$.

(B) The magnetic quantum number may have a negative value.

(C) In the ground state of an atom, the orbitals are filled in order of their increasing energies.

(D) The total number of nodes are given by $n-2$.

Choose the most appropriate answer from the options given below :

Which of the following sets of quantum numbers is not allowed ?

The correct decreasing order of energy for the orbitals having, following set of quantum numbers :

(A) n = 3, l = 0, m = 0
(B) n = 4, l = 0, m = 0
(C) n = 3, l = 1, m = 0
(D) n = 3, l = 2, m = 1

is :

Identify the incorrect statement from the following.

Given below are the quantum numbers for 4 electrons.

A. n = 3, l = 2, m$_l$ = 1, m$_s$ = +1/2
B. n = 4, l = 1, m$_l$ = 0, m$_s$ = +1/2
C. n = 4, l = 2, m$_l$ = −2, m$_s$ = −1/2
D. n = 3, l = 1, m$_l$ = −1, m$_s$ = +1/2

The correct order of increasing energy is

The ground state energy of hydrogen atom is −13.6 eV. Consider an electronic state $\Psi$ of $\ce{He+}$ whose energy, azimuthal quantum number and magnetic quantum number are −3.4 eV, 2 and 0, respectively. Which of the following statement(s) is(are) true for the state $\Psi$?

For the given orbital in Column 1, the only CORRECT combination for any hydrogen-like species is

For $\ce{He+}$ ion, the only INCORRECT combination is

The total number of orbitals associated with the principal quantum number 5 is :

Not considering the electronic spin, the degeneracy of the second excited state $(n=3)$ of H atom is 9, while the degeneracy of the second excited state of $\ce{H-}$ is

In an atom, the total number of electrons having quantum numbers $n=4$, $|m_l|=1$ and $m_s=-\frac12$ is

The correct set of four quantum numbers for the valence electrons of rubidium atom ($Z=37$) is :

The maximum number of electrons that can have principal quantum number, $n=3$, and spin quantum number, $m_s=-\frac12$, is