1. Atomic Properties and the Periodic Table

2. Metallic Property Trend
 generally increases from top to bottom of the periodic table
generally decreases from left to right
Metals are found in the left hand side where as nonmetals are in the far right hand of the periodic table

3. B C N O F I Ar Kr Xe K Ca Rb Sr Cs Fr Si Cl Br Rn H Li Be Na Mg Al AsHe Ne Ar Kr Xe Rn H Li Be Na Mg K Ca Rb Sr Cs Ba Fr Ra B C N O F Al Si P S Cl Ge As Se Br Sb Te I Po At

4. Metals Non-metals 3 or less valence electrons Electron donor
High densities and melting temperature
Oxides are often soluble in acidic solution
Good conductors
Ductile and malleable
Non-metals
5 or more valence electron
Electron acceptor
Low densities and melting points
Oxides are soluble in basic solutions
Poor conductors
Not shiny,malleable and ductile

5. Atomic Size Trend Top to bottom increases Left to right decreases
Reasons
Due to additional energy level as you go down
Due to increasing nuclear charge

7. Ionization Energy
Amount of energy required to remove the electrons in an atom
Trend
top to bottom decreases
 Left to right increases

8. Ionic Size
When an atom combine with another atom to form cation, are always smaller than their atom
Anions are always bigger than their atom Mg O Mg O2-

9. Classwork
Using a periodic table, classify each element as metal or nonmetal
Mg, K, Si, Br, Mn
Arrange the following elements into increasing metallic property
Ba, Sr, Be,Mg, Ca & Ra
In each of the following sets, tell which will be the largest
a) S, S b) Al, Al 3+ c) Ca, Ca2+, Se, Se2+
Arrange the following elements into decreasing ionization energy
a) P, Si,Ar, Cl & Al
b) Rb, K, Cs, Na, Fr, Li

10. Homework In each set which one has the highest ionization energy?
He, Ne, Ar, Kr
Mg, As, Al, F
c) K, K+, Ca, Ca2+
Arrange the trends in atomic size in increasing order for the following ions:
Be2+, Mg2+, Ca2+ & Sr2+

11. Additional Practice
Arrange the succeeding elements according to increasing atomic size
Ar, S2-, P3-, Mg2+
Answer the focus questions 3 through 6 on page