Practice Problem Set

Cl < P < Ba

Place the following elements in order of increasing atomic radius. P Ba Cl

As < N < F

Place the following in order of increasing IE1. N F As

Na < K < Rb < Cs

Place the following in order of increasing metallic character. Rb Cs K Na

Na⁺ < Rb⁺ < Br⁻

Place the following in order of increasing radius. Br⁻ Na⁺ Rb⁺

-2

Predict the charge that an ion formed from sulfur would have.

metalloids

Semiconductors are

chromium.

The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is

Hund's rule.

When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as

Cl

Which element has the highest first ionization energy?

Zn

Which element is diamagnetic?

K+

Which ion has the largest radius?

U

Which of the following elements is an actinide?

The alkali metals are fairly reactive.

Which of the following statements is FALSE?

The halogens tend to form 1+ ions.

Which of the following statements is FALSE?

An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.

Which of the following statements is TRUE?

O(g) → O⁺(g) + e⁻

Which reaction below represents the first ionization of O?

S⁻(g) + e⁻ → S2⁻(g)

Which reaction below represents the second electron affinity of S?

Mg2

Which species has the highest ionization energy?

Electrons in the 2s orbital can penetrate the 1s orbital and be closer to the nucleus.

Why does an electron found in a 2s orbital have a lower energy than an electron found in a 2p orbital in multielectron systems?

[Ar]3d10

Choose the ground state electron configuration for Zn2⁺.

Core electrons effectively shield outer electrons from nuclear charge.

Choose the statement that is TRUE

cation

For a given atom, identify the species that has the smallest radius.

1s22s22p63s23p64s23d5

Give the complete electronic configuration for Mn.

[Xe]6s24f145d106p2

Give the ground state electron configuration for Pb.

[Ar]4s23d104p6

Give the ground state electron configuration for Se2⁻.

46

Give the number of core electrons for Cd.

8

Identify the number of valence electrons in Cl-.

Pauli exclusion principle.

No two electrons can have the same four quantum numbers is known as the