Question:
In a multi-electron atom, which of the following orbitals ? described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ?
(A) $n = 1,\,l = 0, \,m = 0$
(B) $n = 2,\,l = 0, \,m = 0$
(C) $n = 2, \,l = 1,\, m = 1$
(D) $n = 3,\,l = 2,\, m = 1$
(E) $n = 3,\,l = 2, \,m = 0$
In a multi-electron atom, which of the following orbitals ? described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ?
(A) $n = 1,\,l = 0, \,m = 0$
(B) $n = 2,\,l = 0, \,m = 0$
(C) $n = 2, \,l = 1,\, m = 1$
(D) $n = 3,\,l = 2,\, m = 1$
(E) $n = 3,\,l = 2, \,m = 0$
Updated On: Jul 2, 2022
- (D) and (E)
- (C) and (D)
- (B) and (C)
- (A) and (B)
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
(A) 1s $ \quad$$ \quad$(B) 2s
(C) 2p $ \quad$$ \quad$(D) 3d
(E) 3d
In the absence of any field, 3 d in (D) and (E) will be of equal energy.
Was this answer helpful?
0
0
Top AIEEE Chemistry Questions
- The ratio of number of oxygen atoms (O) in 16.0 g ozone $(O_3), \,28.0\, g$ carbon monoxide $(CO)$ and $16.0$ oxygen $(O_2)$ is (Atomic mass: $C = 12,0 = 16$ and Avogadro?? constant $N_A = 6.0 x 10^{23}\, mol^{-1}$)
- AIEEE - 2012
- Chemistry
- Mole concept and Molar Masses
- The compressibility factor for a real gas at high pressure is :
- AIEEE - 2012
- Chemistry
- Van Der Waals equation
Liquids A and B form an ideal solution at 30°C, the total vapour pressure of a solution containing 1 mol of A and 2 mol of B is 250 mmHg. The total vapour pressure becomes 300 mmHg when 1 more mol of A is added to the first solution. The vapour pressures of pure A and B at the same temperature are
- AIEEE - 2012
- Chemistry
- Solutions
- If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become
- AIEEE - 2012
- Chemistry
- Structure of atom
- A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75% of chlorine the formula of the metal chloride will be
- AIEEE - 2012
- Chemistry
- Some basic concepts of chemistry
View More Questions
Top AIEEE Structure of atom Questions
- If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become
- AIEEE - 2012
- Chemistry
- Structure of atom
- The frequency of light emitted for the transition n = 4 to n = 2 of $He^+$ isequalto the transition in H atom corresponding to which of the following?
- AIEEE - 2011
- Chemistry
- Structure of atom
- Ionisation energy of $He^+$ is $19.6 \times 10^{-18}\, J\, atom^{-1}$. The energy of the first stationary state $(n = 1)$ of $Li^{2+}$ is
- AIEEE - 2010
- Chemistry
- Structure of atom
- The energy required to break one mole of $Cl-Cl$ bonds in $Cl_2$ is $242\, kJ\, mol^{-1}$. The longest wavelength of light capable of breaking a single $Cl - Cl$ bond is ($c = 3 \times 108 \,ms^{-1}$ and $NA = 6.02 \times 10^{23}\, mol^{-1}$)
- AIEEE - 2010
- Chemistry
- Structure of atom
- Calculate the wavelength (in nanometer) associated with a proton moving at $1.0 \times 10^3ms^{-1}$ (Mass of proton $= 1.67 \times 10^{-27}\, kg$ and $h = 6.63 \times 10^{-34}\, Js$ ) :
- AIEEE - 2009
- Chemistry
- Structure of atom
View More Questions
Top AIEEE Questions
- A steel wire can sustain $100\, kg$ weight without breaking. If the wire is cut into two equal parts, each part can sustain a weight of
- AIEEE - 2012
- mechanical properties of solids
- If the line $y = mx + 1$ meets the circle $x^2 + y^2 + 3x = 0 $ in two points equidistant from and on opposite sides of $x$-axis, then
- AIEEE - 2012
- Conic sections
- This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements. If you push on a cart being pulled by a horse so that it does not move, the cart pushes you back with an equal and opposite force. The cart does not move because the force described in statement 1 cancel each other.
- AIEEE - 2012
- potential energy
- The variance of first n odd natural numbers is $\frac{n^{2}-1}{3}$ : The sum of first n odd natural number is $n^2$ and the sum of square of first n odd natural numbers is $\frac{n\left(4n^{2}-1\right)}{3}.$
- AIEEE - 2012
- Variance and Standard Deviation
- The ratio of number of oxygen atoms (O) in 16.0 g ozone $(O_3), \,28.0\, g$ carbon monoxide $(CO)$ and $16.0$ oxygen $(O_2)$ is (Atomic mass: $C = 12,0 = 16$ and Avogadro?? constant $N_A = 6.0 x 10^{23}\, mol^{-1}$)
- AIEEE - 2012
- Mole concept and Molar Masses
View More Questions
Concepts Used:
Structure of Atom
Atomic Structure:
The atomic structure of an element refers to the constitution of its nucleus and the arrangement of the electrons around it. Primarily, the atomic structure of matter is made up of protons, electrons and neutrons.
Dalton’s Atomic Theory
Dalton proposed that every matter is composed of atoms that are indivisible and indestructible.
The following are the postulates of his theory:
- Every matter is made up of atoms.
- Atoms are indivisible.
- Specific elements have only one type of atoms in them.
- Each atom has its own constant mass that varies from element to element.
- Atoms undergo rearrangement during a chemical reaction.
- Atoms can neither be created nor be destroyed but can be transformed from one form to another.
Cons of Dalton’s Atomic Theory
- The theory was unable to explain the existence of isotopes.
- Nothing about the structure of atom was appropriately explained.
- Later, the scientists discovered particles inside the atom that proved, the atoms are divisible.
Subatomic Particles
- Protons - are positively charged subatomic particles.
- Electron - are negatively charged subatomic particles.
- Neutrons - are electrically neutral particles and carry no charge
Atomic Structure of Isotopes
Several atomic structures of an element can exist, which differ in the total number of nucleons.These variants of elements having a different nucleon number (also known as the mass number) are called isotopes of the element. Therefore, the isotopes of an element have the same number of protons but differ in the number of neutrons. For example, there exist three known naturally occurring isotopes of hydrogen, namely, protium, deuterium, and tritium.