/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 15 A hydrogen atom in the 5 g state... [FREE SOLUTION] | 91Ó°ÊÓ

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A hydrogen atom in the 5 g state is placed in a magnetic field of 0.600 T that is in the \(z\) -direction. (a) Into how many levels is this state split by the interaction of the atom's orbital magnetic dipole moment with the magnetic field? (b) What is the energy separation between adjacent levels?(c) What is the energy separation between the level of lowest energy and the level of highest energy?

Short Answer

Expert verified
(a) Split into 9 levels, (b) Energy separation: \( 5.5644 \times 10^{-24} \text{ J}\), (c) Total energy separation: \( 4.45152 \times 10^{-23} \text{ J}\).

Step by step solution

01

Determine the Magnetic Quantum Number (m) Range

The hydrogen atom in the 5g state has an orbital quantum number \( l = 4 \), corresponding to the g subshell. The magnetic quantum number \( m \) can take integer values from \( -l \) to \( l \). This range includes \(-4, -3, -2, -1, 0, 1, 2, 3, \) and \( 4 \).
02

Count the Number of Splitted Levels

The number of possible values for \( m \) is given by the formula \( 2l + 1 \). For \( l = 4 \), the number of states is \( 2(4) + 1 = 9 \). So, the 5g state in the magnetic field splits into 9 levels.
03

Calculate the Energy Separation Between Adjacent Levels

The energy separation between levels due to the Zeeman effect is given by the formula \( \Delta E = \mu_B B \), where \( \mu_B \) is the Bohr magneton \( 9.274 \times 10^{-24} \text{ J/T} \), and \( B = 0.600 \text{ T} \). \( \Delta E = 9.274 \times 10^{-24} \times 0.600 = 5.5644 \times 10^{-24} \text{ J} \).
04

Determine the Energy Separation Between Lowest and Highest Energy Levels

The energy difference between the lowest \( m = -4 \) and highest \( m = 4 \) states is \( 2l \Delta E = 2(4)(5.5644 \times 10^{-24} \text{ J}) = 8 \times 5.5644 \times 10^{-24} = 4.45152 \times 10^{-23} \text{ J} \).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Quantum Numbers
In the world of quantum mechanics, quantum numbers play a crucial role in defining the state of an electron in an atom. They provide vital information about the electron's properties and its behavior in space. For instance, in a hydrogen atom, the principal quantum number, often denoted as \( n \), determines the electron's energy level. Alongside this, the azimuthal or angular momentum quantum number \( l \), describes the shape of the orbital. This value ranges from 0 to \( n-1 \). The magnetic quantum number, represented by \( m \), specifies the orientation of the orbital within a magnetic field. Its values range from \( -l \) to \( +l \).
The spin quantum number, \( s \), reveals the intrinsic angular momentum of the electron and can be either +1/2 or -1/2.
For a hydrogen atom in the 5g state, the quantum numbers \( n = 5 \) and \( l = 4 \) come into play. The magnetic quantum numbers range from \(-4\) to \(+4\), providing us with 9 distinct levels or orientations that the electron can occupy.
Magnetic Field
A magnetic field, represented by \( B \), is an external influence that can affect the energy levels of atoms. When atoms with magnetic moments, such as those with electrons in orbit, are placed in a magnetic field, they experience a change in energy levels. This effect, known as the Zeeman Effect, results in the splitting of these energy levels, revealing otherwise hidden details about atomic structure.
In our current scenario, a hydrogen atom is subjected to a magnetic field with strength 0.600 T (tesla) directed along the z-axis. The interaction between the atom's magnetic dipole moment and this magnetic field causes the different orientations of the electron orbits (or the different \( m \) values) to have different energy levels.
  • The presence of this magnetic field makes energy differences more observable.
  • The strength and directionality of the magnetic field are critical for the extent of the Zeeman splitting.
Energy Levels
Understanding energy levels is essential in grasping the Zeeman Effect. In an atom, energy levels are defined by quantum numbers and are generally fixed unless external influences alter them. When a hydrogen atom in the 5g state is placed in a magnetic field, it exhibits what's known as Zeeman splitting.
For a 5g state, this splitting creates 9 distinct energy levels corresponding to the possible magnetic quantum numbers \( m \). The adjacent levels have energy separations calculated using the formula \( \Delta E = \mu_B B \), where \( \mu_B \) is the Bohr magneton.
With our magnetic field of 0.600 T, the energy difference between adjacent levels becomes \( 5.5644 \times 10^{-24} \text{ J} \).
Moreover, the energy difference between the state with the lowest energy \( m = -4 \) and the state with the highest energy \( m = 4 \) involves multiplying this energy separation by the total number of level jumps (from \(-l\) to \(+l\)), calculated as \( 4.45152 \times 10^{-23} \text{ J} \).
Hydrogen Atom
The hydrogen atom is one of the simplest and most studied systems in quantum mechanics. Comprising a single proton and electron, it serves as a perfect model to explore fundamental quantum mechanics concepts, like quantum numbers and electron behavior in magnetic fields.
In the realm of the Zeeman Effect, the hydrogen atom's response to magnetic fields provides valuable insights. The hydrogen atom's energy levels are normally quite distinct, determined primarily by the principal quantum number \( n \). However, when exposed to external magnetic fields, these levels split further depending on the angular momentum quantum number \( l \) and the magnetic quantum number \( m \).
  • This splitting allows scientists to explore the complexities and the hidden potential positions where an electron might reside.
  • Observing these level changes in hydrogen atoms gives insights into atomic structures and magnetic interactions.
By examining such effects in hydrogen, one gains a deeper appreciation for the subtle and elegant ways quantum mechanics governs atomic behavior.

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Most popular questions from this chapter

Calculate, in units of \(\hbar\) , the magnitude of the maximum orbital angular momentum for an electron in a hydrogen atom for states with a principal quantum number of \(2,20,\) and 200 . Compare each with the value of \(n\) h postulated in the Bohr model. What trend do you see?

Classical Electron Spin. (a) If you treat an electron as a classical spherical object with a radius of \(1.0 \times 10^{-17} \mathrm{m},\) what angular speed is necessary to produce a spin angular momentum of magnitude \(\sqrt{\frac{3}{4}} \hbar ?(\mathrm{b})\) Use \(v=r \omega\) and the result of part \((\mathrm{a})\) to calculate the speed \(v\) of a point at the electron's equator. What does your result suggest about the validity of this model?

(a) The energy of an electron in the 4\(s\) state of sodium is \(-1.947 \mathrm{eV} .\) What is the effective net charge of the nucleus "seen" by this electron? On the average, how many electrons screen the nucleus? (b) For an outer electron in the 4\(p\) state of potassium, on the average 17.2 inner electrons screen the nucleus. (i) What is the effective net charge of the nucleus "seen" by this outer electron? (ii) What is the energy of this outer electron?

Each of 2\(N\) electrons (mass \(m )\) is free to move along the \(x\) - axis. The potential-energy function for each electron is \(U(x)=\frac{1}{2} k^{\prime} x^{2},\) where \(k^{\prime}\) is a positive constant. The electric and magnetic interactions between electrons can be ignored. Use the exclusion principle to show that the minimum energy of the system of 2\(N\) elecurons is \(\hbar N^{2} \sqrt{k^{\prime} / m}\) (Hint: See Section 40.4 and the hint given in Problem \(41.59 .\) .)

An electron is in the hydrogen atom with \(n=5 .(a)\) Find the possible values of \(L\) and \(L_{z}\) for this electron, in units of \(\hbar\) . (b) For each value of \(L,\) find all the possible angles between \(L\) and the \(z\) -axis. (c) What are the maximum and minimum values of the magnitude of the angle between \(L\) and the \(z\) -axis?

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