1. Periodic Table of Elements
A Guide to the Chemical Elements

2. History of the Periodic Table
1896 1st introduced by Dimitri Mendeleev
Arranged the elements by increasing atomic mass and element properties
1913 Henry Moseley changed the table by arranging the elements by increasing atomic number
Modern table is divided into rows (periods) and vertical columns (groups) in order of increasing atomic number

3. Areas of the Periodic Table of Elements

4. Metals Alkali Metals Group IA or 1 All have 1 valence electronRb Cs Fr
Alkali Metals
Group IA or 1
All have 1 valence electron
+1 oxidation number
Very reactive, can corrode in air
Soft, malleable, and ductile
Good conductors of electricity
Lithium, Sodium, Potassium,
Rubidium, Cesium, and Francium

5. Metals Alkaline Earth Metals Group IIA or 2Be Mg Ca Sr Ba Ra
Alkaline Earth Metals
Group IIA or 2
All have 2 valence electrons
+2 oxidation Number
Reactive elements
Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium

6. Transition Metals Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Y Zr Nb Mo Tc Ru RhPd Ag Cd In Sn La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Ac Rf Db Sg Bh Hs Mt Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

7. Transition Metals Groups III B – VIII B or 3-13 Have 3 major areas:
Actinide Series
Lanthanide Series
+ oxidation numbers
Hg is only liquid at room temperature

8. Metalloids Have both properties of metals and nonmetalsSi
Have both properties of
metals and nonmetals Ge As Sb Te Po
Are semiconductors; can
conduct electricity on a
small scale
Boron, Silicon, Germanium,
Arsenic, Antimony, Tellurium,
and Polonium

9. Nonmetals Halogens Group VII A or 17 Each contains 7 valence electronsF Cl Br I At
Halogens
Group VII A or 17
Each contains 7 valence electrons
-1 oxidation number
Fluorine, Chlorine, Bromine, Iodine,
& Astatine
Called halogens, because they often produce a salt compound
Halogen comes from Greek “Halos” = salt and “Gen” = born

10. Nonmetals Nobel Gases Group VIII A or 18 Called Nobel or Inert GasesHe Ne Ar Kr Xe Rn
Nobel Gases
Group VIII A or 18
Called Nobel or Inert Gases
All have 8 valence electrons, except
Helium only has 2
Helium, Neon, Argon, Krypton,
Xenon, and Radon

11. Nonmetals Other Groups IV A – VIIA or 14 - 17 Group 15 has 5 valenceF
Other P S Cl
Groups IV A – VIIA or Se Br I
Group 15 has 5 valence
electrons, and a –3 oxidation number At
Group 16 has 6 valence electrons, and
a –2 oxidation number
All are gases at room temperature
except Br, which is a liquid

12. Resources:
Los Alamos Lab Periodic Table
Periodic Table with pictures
Information on Periodic Table
Chemical Elements.com

13. The End