NAME ________________________________________ QUANTUM … QUICKLY
Superscripts indicate the number of e- occupying the orbitals of the specific sublevel
1s22s22p5
Large integers indicate the PEL (n)
the small-case letters represent sublevels
that are divided into orbitals, with e-
The Aufbau Diagram (listed here up to 5f)., helps
to place (configure) electrons, but does NOT help
to interpret the “why” of the configuration
Recall that every orbital can hold a
maximum of 2 e-, in opposite “spins”.
•Every s sublevel has 1 orbital.
•Every p sublevel has 3 (degenerate) orbitals
•Every d sublevel has 5 (degenerate) orbitals
•Every f sublevel has 7 (degenerate) orbitals
Principal Energy Level
1
2
3
4
1) 1s2 2s2 2p6 3s1 OR
1s
2s
3s
4s
5s
2p
3p 3d
4p 4d 4f
5p 5d 5f
# of sublevels
s
s,p
s,p,d
s,p,d,f
# of orbitals per sublevel
s= 1
s =1, p = 3
s =1, p = 3, d = 5
s =1, p = 3, d = 5, f = 7
[Ne] 3s1
a. The element, will be found in period
of the periodic table
b. Based solely upon the configuration the element is in group
of the periodic table
c. Based upon the configuration, the atom is a member of the family called the
d. The atom appears to have
(a number) incomplete or half-filled orbitals, in the ground state
e. The first electron(s) used in bonding most likely involve the
oxidation state of _____
sublevel, creating an
f. The electron configuration of the species with the above oxidation state is
g. The atom has electron shells completely filled up through the
h. The configuration implies that while occupied, the
principal energy level,
principal energy level is NOT filled.
2) 1s2 2s2 2p6 3s2 3p6 3d3 4s2 OR
[Ar] 3d3 4s2
a. The element, will be found in period
of the periodic table
b. Based solely upon the configuration the element is in group
of the periodic table
c. Based upon the configuration, the atom is a member of the family called the
d. The atom appears to have
(a number) incomplete or half-filled orbitals, in the ground state
e. The first electron(s) used in bonding most likely involve the
oxidation state of _____
sublevel, creating an
f. The electron configuration of the species in the above oxidation state is:
g. This atom could become a species of oxidation state 5+. How? ________________________
________________________________________________________
h. The atom has electron shells completely filled up through the
i. The configuration implies that while occupied, the
3) 1s2 2s2 2p6 3s2 3p2 OR
principal energy level,
principal energy level is NOT filled.
[Ne] 3s2 3p2
a. The element, will be found in period
of the periodic table
b. Based solely upon the configuration the element is in group
of the periodic table
c. Based upon the configuration, the atom is a member of the family called the
d. The atom appears to have
(a number) incomplete or half-filled orbitals, in the ground state
e. The first electron(s) used in bonding most likely involve the
oxidation state of _____
sublevel, creating an
f. The electron configuration of the species with the above oxidation state is
g. The atom has electron shells completely filled up through the
h. The configuration implies that while occupied, the
principal energy level,
principal energy level is NOT filled.
4) 1s2 2s2 2p6 3s2 3p5 OR
[Ne] 3s2 3p5
a. The element, will be found in period
of the periodic table
b. Based solely upon the configuration the element is in group
of the periodic table
c. Based upon the configuration, the atom is a member of the family called the
d. The atom appears to have
(a number) incomplete or half-filled orbitals, in the ground state
e. The first electron(s) used in bonding most likely involve the
oxidation state of _____
sublevel, creating an
f. The electron configuration of the species with the above oxidation state is:
g. The atom has electron shells completely filled up through the
h. The configuration implies that while occupied, the
principal energy level,
principal energy level is NOT filled.
5) 1s2 2s2 OR [He] 2s2
a. The element, will be found in period
of the periodic table
b. Based solely upon the configuration the element is in group
of the periodic table
c. Based upon the configuration, the atom is a member of the family called the
d. The atom appears to have
(a number) incomplete or half-filled orbitals, in the ground state
e. The first electron(s) used in bonding most likely involve the
oxidation state of _____
sublevel, creating an
f. The electron configuration of the species with the above oxidation state is
g. The atom has electron shells completely filled up through the
h. The configuration implies that while occupied, the
Answers: 1 a) 3 b) 1 c) alkali metal
d) 1 e) 3s, 1+ f) [Ne]
principal energy level,
principal energy level is NOT filled.
g) 2nd h) 3rd
2a) 4 b) 5 (add highest inner d electrons and outer s electrons c) transition metal d) 5 …each of the “d” orbitals are
either ½ filled or empty e) 4s , +2 f) [Ar] 3d 3 g) losing 4s and 3d electrons
h) 2nd i) 3rd and 4th
3a) 3 b) 14 c) carbon family d) 3 each of the 3p orbitals is either ½ filled or empty e) 3p , 4 –
f) [Ar] or [Ne] 3s2 3p6 g) 2nd f) 3rd
4a) 3
b) 17
5a) 2 b) 2
c) halogens d) 1
e) 3p, 1- f) [Ar] or [Ne] 3s2 3p6 g) 2nd h) 3rd
c) alkaline earth metal d) 0
e) 2s
f) 2+
g) 1 st
h) 2nd