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

4.2.1 - The Alkali Metals

The alkali metals: Li, Na, K, Rb, Cs, and Fr.

View the alkali metals.
Physical
Properties:
  • grey, soft metals that can be cut with a knife.
  • low densities
  • good conductors of heat and electricity
Chemical
Properties:
  • alkali metals react with water, oxygen, and other chemicals
  • alkali metals are never found as free elements in nature (i.e. - sodium metal does not exist as Na metal in nature, sodium exists in compounds such as NaCl, Na2CO3, etc...)
  • alkali metal compounds are water soluble and are present in seawater and salt deposits.
  • all alkali metals have one valence electron (section 3.3) which form ions with a positive (1+) charge
Storage:
  • since alkali metals react quickly with oxygen, they are stored under mineral oil or kerosene.
Abundance:
  • sodium and potassium are the most common; they are the 6th and 7th most abundant elements in the Earth's crust.
Common
Compounds:
  • sodium chloride, NaCl; found in seawater
  • potassium chloride, KCl; used in fertilizers

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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