Chem Sem 1 Review Part 2

Which element has the electron configuration [Ar]4s2 3d10 4p5?

• iodine

• bromine

• chlorine

• krypton

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6?

• krypton

• argon

• bismuth

• fluorine

Which noble gas should be used in the shorthand configuration of Mg (At. #12)

• helium

• neon

• argon

• krypton

Identify the correct electron configuration for boron.

• 1s2 2s2 2p4

• 1s2 2s2 2p1

• 1s2 2s2 3s2

• none of the above

What is the electron configuration for copper?

• 1s2 2s2 2p6 3s2 3p6 4s1 3d9

• 1s2 2s2 2p6 3s2 3p6 4s1 3d10

• 1s2 2s2 2p6 3s2 3p6 4s2 3d9

• 1s2 2s2 2p6 3s2 3p6 3d10

1. Which of these shows a violation of the Aufbau Principle?

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6

• 1s2 2s2 4p6

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Find the four quantum numbers for the last electron in sulfur.

• n = 3, ℓ = 1, mℓ = -1, s = -½

• n = 3, ℓ= 1, mℓ = 1, s = +½

•  n = 3, ℓ= 2, mℓ = -1, s = –½

• n = 3, ℓ= 1, mℓ = 0, s = –½

What is the value for the principle (n) quantum number if the end configuration is 3d9?

• 0

• 1

• 2

• 3

What is the value for the azimuthal (ℓ) quantum number if the end configuration is 3d9?

• 0

• 1

• 2

• 3

What type of elements are represented by quantum numbers n=3 and ℓ= 2?

• nonmetals

• rare earth metals

• transition metals

• light earth metals