(Multiple choice)

(1)

The energy of the ground state of doubly ionized lithium (Z = 3) is ______, where E₀ = 13.6 eV.

(a) –9E₀,

(b) –3E₀,

(c) –E₀/3,

(d) –E₀/9.

(2)

Bohr’s quantum condition on electron orbits requires

(a) That the angular momentum of the electron about the hydrogen nucleus equal nh.

(b) That no more than one electron occupy a given stationary state.

(c) That the electrons spiral into the nucleus while radiating electromagnetic waves.

(d) That the energies of an electron in a hydrogen atom be equal to nE₀, where E₀ is a constant energy and n is an integer.

(e) None of the above.

(3)

The kinetic energy of the electron in the ground state of hydrogen is 13.6 eV = E₀. The kinetic energy of the electron in the state n = 2 is _____.

(a) 4E₀,

(b) 2E₀,

(c) E₀/2,

(d) E₀/4.

(4)

The kinetic energy of the electron in the ground state of hydrogen is 13.6 eV = E₀. The kinetic energy of the electron in the state n = 2 is _____.

(a) 4E₀,

(b) 2E₀,

(c) E₀/2,

(d) E₀/4.

(5)

The radius of the n = 1 orbit in the hydrogen atom is a₀ = 0.053 nm. What is the radius of the n = 5 orbit?

(a) 5a₀,

(b) 25a₀,

(c) a₀,

(d) (1/5)a₀,

(e) (1/25)a₀.

(6)

For the principal quantum number n = 4, how many different values can the orbital quantum number l have?

(a) 4,

(b) 3,

(c) 7,

(d) 16,

(e) 6.

(7)

For the principal quantum number n = 4, how many different values can the magnetic quantum number m have?

(a) 4,

(b) 3,

(c) 7,

(d) 16,

(e) 6.

(8)

The total number of quantum states of hydrogen with quantum number n = 4 is _____.

(a) 4,

(b) 16,

(c) 32,

(d) 36.

(9)

The p state of an electronic configuration corresponds to

(a) n = 2,

(b) ℓ = 2,

(c) ℓ = 1,

(d) n = 0,

(e) ℓ = 0.

(10)

The total number of quantum states of hydrogen with quantum number n = 4 is ________.

(a) 4

(b) 16

(c) 32

(d) 36

(11)

How many of oxygen's eight electrons are found in the p state?

(a) 0,

(b) 2,

(c) 4,

(d) 6,

(e) 8.

(12)

An electron in the L shell means that

(a) ℓ = 0 ,

(b) ℓ = 1,

(b) n = 1,

(c) n = 2,

(d) m = 2,

(e) none of the above are true.