Periodic Table and Electron Configurations Worksheet Key
A. Identify the period for each element.
Li
Period 2
P
Period 3
He
Period 1
W
Period 6
U
Period 7
B. Identify the group number for each element.
Mg
Group IIA (2)
Ti
Group IVB (4)
Ne
Group VIIIA (18)
S
Group VIA (16)
F
Group VIIA (17)
C. Identify the block for each element.
Mn
d block
Cu
d block
Nd
f block
Al
p block
Xe
p block
D. Identify the highest principal energy level for the last electron in each element.
Co
n = 3
O
n = 2
Ar
n = 3
C
n = 2
U
n = 5
E. Energy Level Diagrams
Ti
Ti 2 – 8 – 10 – 2
I
I 2 – 8 – 18 – 18 – 7
Sn
Sn 2 – 8 – 18 – 18 – 4
U
U 2 – 8 – 18 – 32 – 22 – 8 – 2 (theoretical aufbau) 2 – 8 – 18 – 32 – 21 – 9 – 2 (actual)
Cr
Cr 2 – 8 – 13 – 1 (an exception to aufbau)
Hg
Hg 2 – 8 – 18 – 32 – 18 – 2