1.5 THE PERIODIC TABLE AND PERIODIC LAW

The modern periodic table follows Periodic Law:

Standard periodic table contains element names, symbols, atomic number and mass
number. Most periodic tables also indicate the state of the element (at 25 C and 100 kPa)
The periodic table consists of
(horizontal rows) and
(vertical columns).
are generally located on the left of the staircase,
on the
right or the staircase, and
along the staircase


Periodic Table of the Elements
© 2006 Encyclopedia Britannica, Inc.
Special Features:
Hydrogen
Representative Elements (a)
Transition
Metals (b)
Lanthanides
unique, because of its location (different from other non-metals)
physically a non-metal, but has the chemical properties of a metal
metals and non-metals from Group 1-2, 13-18
vary as solids, liquids, gases
contain alkali metals, alkaline earth metals, halogens and noble gases
Actinides
Transuranic
Elements
Zigzag
Staircase
Periodic Trends, Bohr-Rutherford Diagrams, and Lewis Symbols
Group 1
Group 2
Group 17
Group 18
Alkali Metals
Alkaline Earth
Metals
Halogens
Noble Gases
Li, Na, K (solids)
Be, Mg, Ca, Sr
(solids)
F, Cl (gases)
Br (liquid)
I, At (solds)
He, Ne, Ar (gases)
Group
Name
Examples
Physical
Properties
Chemical
Properties
BohrRutherford
Diagram
Lewis
Symbols
Lewis Symbols
(Lewis Structures for representative elements – Figure 4 on Page 32)
HOMEWORK: Read Page 30-33 and do Questions #1-9 on Page 33