CH. 28

According to Pauli's exclusion principle, how many electrons in an atom may have a particular set of quantum numbers? A) 1 B) 3 C) 2 D) 4 E) 5

A

The elements in the periodic table that have completely filled shells or subshells are referred to as A) noble gases. B) halogens. C) alkali metals. D) transition elements.

A

Which of the following values can be taken by the electron spin quantum number, ms? A) ±1/2 B) 0 C) ±1 D) ±2 E) ±3

A

According to the quantum mechanical model of the hydrogen atom, if the principal quantum number is n, how many different orbital angular momentum quantum numbers are permitted? A) n/2 B) n C) 2n D) 3n E) 4n

B

Consider ground-state helium having two electrons in orbit. If one of the electrons has quantum numbers (n, ℓl, m1, ms) of 1, 0, 0, -1/2 respectively, the quantum numbers for the other electron will be A) 1, 1, 0, -1/2. B) 1, 0, 0, +1/2. C) 1, 1, 1, +1/2. D) none of the given answers.

B

If the maximum possible accuracy in measuring the energy of a particle increases, the maximum possible accuracy in measuring its lifetime will A) increase. B) decrease. C) not be affected.

B

If the maximum possible accuracy in measuring the lifetime of a particle increases, the maximum possible accuracy in measuring its energy will A) increase. B) decrease. C) not be affected.

B

If the maximum possible accuracy in measuring the position of a particle increases, the maximum possible accuracy in measuring its velocity will A) increase. B) decrease. C) not be affected.

B

If the maximum possible accuracy in measuring the velocity of a particle increases, the maximum possible accuracy in measuring its position will A) increase. B) decrease. C) not be affected.

B

The magnetic quantum number m1 can have any integer value ranging from A) -n to +n. B) -ℓ to +ℓ. C) 0 to n. D) 0 to ℓ. E) 0 to (n-1)

B

The orbital angular momentum quantum number ℓ can have any integer value ranging from A) 0 to n. B) 0 to (n-1). C) 1 to n. D) 1 to (n+1). E) -n to n.

B

According to the quantum mechanical model of the hydrogen atom, if the orbital angular momentum quantum number is ℓ, there will be how many permitted magnetic quantum numbers? A) ℓ/2 B) 2ℓ C) 2ℓ + 1 D) 2ℓ - 1 E) 3ℓ

C

In its ground state, the quantum numbers (n, ℓ, m1, ms) for hydrogen are, respectively, A) 1, 1, 1, 1. B) 1, 0, 0, 0. C) 1, 0, 0, ±1/2. D) 1, 1, 1, ±1/2.

C

The orbital angular momentum quantum number can take which of the following values for any given value of the principal quantum number, n? A) ℓ = 0, 1, 2, . . . B) ℓ = 0, 1, 2, . . . , n C) ℓ = 0, 1, 2, . . . , (n - 1) D) ℓ = 1, 2, 3, 4, . . . E) ℓ = 1, 2, 3, 4, . . ., (n + 1)

C

The principal quantum number n can have any integer value ranging from A) -∞ to +∞. B) 0 to ∞. C) 1 to ∞. D) 1 to 100.

C

What is the atomic number of a neutral atom that has an electron configuration of 1s2 2s2 2p6 3s2 3p2? A) 5 B) 11 C) 14 D) 20

C

A hydrogen atom is in the 6h state. What is the principal quantum number. A) 0 B) 3 C) 5 D) 6 E) 7

D

If n = 5, which one of the following is not an allowed magnetic quantum number m1? A) 0 B) 2 C) 4 D) 5

D

The electron spin quantum number can have values of A) -1/2, -1, 0, +1, +1/2. B) -1/2, -1, +1, +1/2. C) -1/2, 0, +1/2. D) -1/2, +1/2. E) only +1/2.

D

If ℓ = 4, which one of the following is a possible quantum number for n? A) 0 B) 2 C) 3 D) 4 E) 8

E