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 .