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 # 4 - The Periodic Table
The Periodic Trends

  • (a) What is the trend in atomic size from left to right for period 3? Explain.
  • (b) What is the trend in atomic size in group VIIA? Explain.
  • (c) Which element has the smallest atomic radius?
    Mg Sr Be
  • (d) Which element has the largest atomic radius?
    Ca Kr As
  • (e) Which element has the smallest atomic radius?
    S Ba Te
  • (f) Which element has the largest atomic radius?
    Sn P Cs
  • (g) What group of elements on the periodic table has the greatest atomic size?

    The halogens The noble gases The alkali metals

  • (h) Which is the larger, a potassium atom or a potassium ion? Explain.
  • (i) Which is the larger, a fluorine atom or a fluoride ion? Explain.
  • (j) How does the atomic radius of copper, a transition element, compare the ionic radius of copper, Cu+?

    The ionic radius is much larger.
    They are about the same.
    The atomic radius is larger.

  • (k) What is an isoelectronic series?
  • (l) Which of the following sets are isoelectronic with each other?

    K+, Ca+2, Ar
    Al, Mg2+, Si
    Ar, Ne, Kr

  • (m) Which of the following sets are isoelectronic with each other?

    Rb+, Sr+2, Xe
    Al+3, Na+, Ne
    Br-, Na+, Se-2

  • (n) Arrange the atoms and ions in order of increasing size, Rb+, Na+, and K+.

    Na+ < K+ < Rb+
    Rb+ < K+ < Na+
    Na+ < Rb+ < K+

  • (o) Arrange the atoms and ions in order of increasing size, Li+, Be+2, and Cl-.

    Cl- < Li+ < Be+2
    Be+2 < Cl- < Li+
    Be+2 < Li+ < Cl-

  • (p) Arrange the atoms and ions in order of increasing size, K+, S-2, Cl- and Ar.

    K+ < S-2 < Cl- < Ar
    K+ < Ar < Cl- < S-2
    S-2 < Cl- < Ar < K+

  • (q) What is the trend in melting points for the alkali metals?
  • (r) What is the trend in boiling points for the halogens?
  • (s) Arrange the following in increasing boiling points, Rb, K, Li, Cs ?

    K < Li < Rb < Cs
    Li < K < Rb < Cs
    Cs < Rb < K < Li

  • (t) Arrange the following in increasing melting points, I, Cl, Br, F ?

    F < Cl < Br < I
    I < Br < Cl < F
    F < Br < Cl < I

  • (u) Arrange the following in increasing boiling points, Na, Br, F ?

    F < Br < Na
    Na < Br < F
    Br < F < Na

  • (v) Arrange the following in increasing metallic characteristics, Na, Al, Rb ?

    Al < Cs < Na
    Cs < Na < Al
    Al < Na < Cs

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