Atomic Properties and the Periodic Table. Metallic Property Trend generally increases from top to...
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Transcript of Atomic Properties and the Periodic Table. Metallic Property Trend generally increases from top to...
Atomic Properties and the Periodic Table
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
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 IPo At
He
Ne
Ar
Kr
Xe
Rn
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
Atomic Size
TrendTop to bottom increasesLeft to right decreases
ReasonsDue to additional energy level as you
go downDue to increasing nuclear charge
Ionization Energy
Amount of energy required to remove the electrons in an atom
Trendtop to bottom decreases
Left to right increases
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 Mg2+ O2-
Classwork
Using a periodic table, classify each element as metal or nonmetal
Mg, K, Si, Br, Mn Arrange the following elements into increasing metallic propertyBa, Sr, Be,Mg, Ca & RaIn each of the following sets, tell which will be the largest
a) S, S2- b) Al, Al 3+ c) Ca, Ca2+, Se, Se2+
Arrange the following elements into decreasing ionization energya) P, Si,Ar, Cl & Al
b) Rb, K, Cs, Na, Fr, Li
Homework
In each set which one has the highest ionization energy?
a) He, Ne, Ar, Krb) Mg, As, Al, Fc) K, K+, Ca, Ca2+
Arrange the trends in atomic size in increasing order for the following ions:
Be2+, Mg2+, Ca2+ & Sr2+
Additional Practice
Arrange the succeeding elements according to increasing atomic size
Ar, S2-, P3-, Mg2+
Answer the focus questions 3 through 6 on page