Author Question: For an atom of hydrogen without the effects of an external magnetic field, an electron transition ... (Read 63 times)

jessicacav

  • Hero Member
  • *****
  • Posts: 558
For an atom of hydrogen without the effects of an external magnetic field, an electron transition from the 3P subshell to the 2P subshell is called a forbidden transition. Why is this so?
  a. Electrons in hydrogen are forbidden from transitioning in that way due to peculiarities unique to solutions of Schrdinger's equation for hydrogen.
  b.The normal Zeeman effect prohibits certain transitions from occurring.
  c. Since the electron at low energies must pass through the nucleus, nuclear effects prevent certain transitions to orbits through the nucleus.
  d.An atom that changes energy through transitioning must either absorb or emit a photon.

Question 2

Which of the following states of the hydrogen atom, as defined only by the principal quantum number, angular momentum quantum number, and magnetic quantum number, is allowed?
 
a. n = 0, l = 2, ml = 1
  b. n = 5, l = 2, ml = 3
  c. n = 0, l = 1, ml = 2
  d. n = 5, l = 2, ml = 0
  e. n = 2, l = 2, ml = 0


Question 3

For an atom of hydrogen where the quantum number n = 3, how many possible independent configurations of the atom exist (consider principal quantum number n, angular momentum quantum number l, magnetic quantum number ml, and magnetic spin quantum number ms)?
 
a. 18
  b. 8
  c. 32
  d. 26
  e. infinite



Smiles0805

  • Sr. Member
  • ****
  • Posts: 305
Answer to Question 1

d.
A photon must be emitted when the electron transitions from n = 3 to n = 2, and the photon carries a specific angular momentum of l = 1. The transition from a P subshell to another Psubshell, both with angular momentum l = 2, is therefore forbidden.

Answer to Question 2

d.
The rules governing the configurations of the hydrogen atom are n > 0, l < n, and l ml. When n = 5, l must be 4 or less and when l = 2, ml must be 2 or less. The restrictions set by the solution to Schrdinger's equation are satisfie

Answer to Question 3

a.
For n = 3, l = 2, 1, 0; for each l, ml, = -l, -(l - 1), ..., (l - 1), l; and for each of the states given by n, l, and ml, ms = -1/2, 1/2. This corresponds to 18 individual states.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

For a complete list of videos, visit our video library