Chapter 28 Questions

Question 1

For each of the following transitions in a hydrogen atom free of external fields, determine whether the electron energy decreases, increases, or remains unchanged: the electron moves from n =2 to n = 4

Answer 1

increases

Question 2

For each of the following transitions in a hydrogen atom free of external fields, determine whether the electron energy decreases, increases, or remains unchanged: the electron moves from n = 4 to n = 3

Answer 2

decreases

Question 3

For each of the following transitions in a hydrogen atom free of external fields, determine whether the electron energy decreases, increases, or remains unchanged: within the n=3 level, the electron moves from l=2 to l=-2

Answer 3

remains unchanged

Question 4

For each of the following transitions in a hydrogen atom free of external fields, determine whether the electron energy decreases, increases, or remains unchanged: within the n=4 and l=2 sublevel, the electron moves from ml=-1 to ml=+1

Answer 4

remains unchanged

Question 5

What is the energy in eV of the lowest-energy state available to an electron in a hydrogen atom

Answer 5

-13.6 eV

Question 6

What is the energy in eV of the highest energy state available to an electron in a hydrogen atom?

Answer 6

0

Question 7

What principle quantum number n corresponds to the lowest energy state?

Answer 7

1

Question 8

Consider a hydrogen atom and a singly ionized helium atom. Which atom has the lower ground state energy?

Answer 8

helium!

Question 9

If the principle quantum number is n=5, how many different values of the following (l and ml) are possible? how many states have distinct pairs of l and ml?

Answer 9

l=5
ml=9
combinations = 25

Question 10

Krypton has how many electrons in its next to outer shell (n=3)?

Answer 10

18