Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 4  
spacerspacerIntroduction
spacerspacerObjectives
spacerspacerReading


spacer4.1 The Periods
spacer4.2 The Groups
spacerGroup IA - Alkali metals
spacerGroup IIA - Alkaline earth metals
spacerGroup VIIA - Halogens
spacerGroup VIIIA - Noble gases
spacer4.3 Metals,
spacerNonmetals,
spacerSemimetals

spacerProperties of Metals
spacerProperties of Nommetals
spacerProperties of Semimetals
spacerSummary
spacer4.4 Metallic
spacerBonding

spacer4.5 Octet
spacerRule

spacer4.6 Ions
spacer
4.7 Covalent
spacerBonding

spacerCovalent Bonding & Groups
spacer
4.8 Atomic
spacerSize

spacer
4.9 Ionic
spacerSize

spacerIonic Size of Metal Ions
spacerIonic Size of Nonmetal Ions
spacerIonic Size for Isoelectronic Series
spacer
4.10 mp/bp
spacerTrends
spacer
4.11 Metallic
spacerTrend


spacer** More
spacerspacerperiodic
spacerTrends
**


spacerspacerProblems
spacer1 | 2 | 3
spacerspacerCrossword
spacerspacerHow well do you
spacerknow your
spacerPeriodic Table?

Unit #4THE PERIODIC TABLE

4.2 - The Groups

4.2.2 - The Alkaline Earth Metals

The alkaline earth metals: Be, Mg, ca, Sr, and Ba.

View the alkaline earth metals.
Physical
Properties:
  • low densities, but higher than densities of the comparable alkali metals
Chemical
Properties:
  • less reactive than the alkali metals
  • all alkaline earth metals have two valence electrons which form ions with a positive (2+) charge
Abundance:
  • calcium is the fifth most abundance element; about 4% of the earth's crust is Ca or Mg.
Common
Compounds:
  • calcium are found as calcium carbonate, CaCO3 in chalk, limestone, marble, and calcite.
  • magnesium metal is used in flash powder and photographic lightbulbs
  • hard water contains calcium and magnesium ions
  • beryllium and its compounds are toxic
  • barium compounds are used as white pigments

Follow this interesting link to see more pictures of the elements:


Section 5.2
The Periodic Table Periods and Groups ..p106

Section 5.3
General Characteristics of the Groups ..p109

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