Chapter 9

Give the ground state electron configuration for Se.

[Ar]4s23d104p4

How many valence electrons does an atom of Al possess ?

3

How many valence electrons do the halogens possess ?

7

Give the ground state electron configuration for Se²- .

[ Ar ] 4s23d104p6

Give the ground state electron configuration for I.

[ Kr ] 5s²4d105p5

Give the ground state electron configuration for Pb .

[ Xe ] 6s24f145d106p2

How many valence electrons do the alkali metals possess

1

Place the following in order of increasing IE₁ .

As < N < F

Only two electrons , with opposing spins , are allowed in each orbital is known as the

Aufbau

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

Cl < P < Ba

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

Hund's

Place the following in order of decreasing metallic character . P As K

K > As > P

Identify the species that has the smallest radius .

N + 3

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

Na < K < Rb < Cs

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

Pauli

Which reaction below represents the second electron affinity of S ?

S- ( g ) + e- → S²- ( g )

Identify the element that has a ground state electronic configuration of [ kr ] 5s²4d5 .

Tc

Place the following in order of decreasing radius .

Te²- > 0²- > F

Choose the ground state electron configuration for Zn² + .

[ Ar ] 3d¹0

A cation of +2 indicates that an element has

lost two electrons .