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Periodic Table Review Activity. Definition. What does PERIODIC mean? A repeating pattern Mendeleev left some spaces in his table because not all elements lined up according to atomic mass. He used info he knew about surrounding elements to PREDICT properties and masses of unknown elements.

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Periodic table review activity

Periodic TableReview Activity


  • What does PERIODIC mean?

    • A repeating pattern

  • Mendeleev left some spaces in his table because not all elements lined up according to atomic mass. He used info he knew about surrounding elements to PREDICT properties and masses of unknown elements.

    How about that!

Mendeleev 1869
Mendeleev (1869)

  • Organized table by...


  • Thought pattern must exist between all elements

  • Elements in columns show similar properties…

    • Both physical and chemical!

  • Predicted properties of “missing” elements

Moseley c 1914
Moseley (c. 1914)

  • rearranged table by ...


  • Determined atomic number of elements by determining number of protons in element

Seaborg 1944
Seaborg (1944)

  • Rearranged Periodic Table with...

    • Lanthanide and Actinide Series pulled out/separated from main Periodic Table

  • Discovered countless isotopes & 10 new elements

Information from periodic table
Information from Periodic Table

  • Atomic number

  • Chemical symbol

  • Atomic mass

  • Chemical name

  • Plus countless other information, depending on the table used!

Columns of table groups or families
Columns of Table = groups or families

  • Newer designation: 1-18

  • 8 main families labeled with Roman Numeral and letter ‘A’

  • Elements within the same family have similar but not identical properties

  • Electron configuration varies periodically (pattern of valence electrons)

    • family # 1-2-13-14-15-16-17-18


  • valence e- 1-2-3-4-5-6-7-8

  • Groups families gives valence e











    • Valence electrons

      • electrons found in the outermost energy level

      • use the group number to determine number of valence electrons

    Names of families

    Group 1 or IA

    Group 2 or IIA

    Group13 or IIIA

    Group 14 or IVA

    Group 15 or VA

    Group 16 or VIA

    Group 17 or VIIA

    Group 18 or VIIIA

    Groups 3-12

    Lanthanide & Actinide series

    Alkali metals

    Alkaline Earth metals

    Boron family

    Carbon family

    Nitrogen family



    Noble gases

    Transition metals

    Inner transition metals

    Names of Families

    Rows of table periods
    Rows of Table = periods

    • Properties are not alike within a period

    • 7 periods = number of energy levels in atom

    • 2 additional rows at bottom of table are Lanthanide and Actinide series and belong to periods 6 and 7


    • Valence number

    • Charge of ion

    • Tendency to gain or lose electrons

    • Atomic size (radius)

    • Ionization energy

    • Electron affinity

    • Electronegativity

    • Reactivity

    • Metallic vs. nonmetallic properties

    Periodic law

    The physical and chemical properties of the elements are periodic functions of their atomic number.

    The tendency of atoms to gain or lose electrons so they acquire 8 electrons in their outer energy level for stability

    Octet Rule


    Ionization energy

    energy required to remove an electron from an atom; to form a cation


    attraction of an atom for an added electron; to form an anion


    Ionization Energy

    Electron Affinity

    Atomic radius

    estimate of the size of an atom a cation

    distance between the nucleus and the likely location of electron cloud

    ability of an atom to compete with other atoms for electrons shared between them

    i.e. who wants them more?

    Atomic Radius


    Across a period
    Across a Period a cation

    • radius decreases

    • ionization energy increases

    • electronegativity increases

    • b/c

      • number of protons increases, as does number of electrons…

      • number of valence electrons increases…

      • so EMF increases…

      • so valence electrons held more tightly…

    Atomic radius1
    Atomic Radius a cation

    PERIOD 3

    PERIOD 2

    Ionization energy1
    Ionization Energy a cation

    PERIOD 2

    PERIOD 3

    Electronegativity a cation

    PERIOD 2

    PERIOD 3

    Down a family
    Down a Family a cation

    • radius increases

    • ionization energy decreases

    • electronegativity decreases

    • b/c

      • number of energy levels increases…

      • so valence electrons held less tightly b/c further away from nucleus…

    Atomic radius2
    Atomic Radius a cation

    Family IA

    Family IIA

    Ionization energy2
    Ionization Energy a cation

    Family IIA

    Family IA

    Electronegativity a cation

    Family IIA

    Family IA

    Alkaline earth metals lab
    Alkaline Earth Metals Lab a cation

    • An element that is highly reactive tends to gain or lose electrons very easily.

    • A precipitate is an insoluble solid formed as a result of a chemical reaction.

    • In this lab, magnesium formed the least number of precipitates, while barium formed the greatest number of precipitates.

    • Why do you think reactivity increases down a family???

    Regions of the table

    One more!




    Metals a cation

    • Found to LEFT of zigzag line on table

    • Good conductors of heat & electricity

    • Malleable (can hammer into thin sheet without breaking)

    • Ductile (can pull into thin wire without breaking)

    • High melting & boiling points

    • Shiny in luster

    • Tend to lose electrons

    Nonmetals a cation

    • Found to RIGHT of zigzag line on table

    • Poor conductors of heat & electricity

    • Brittle when solid (break irregularly)

    • Dull in luster

    • Low melting & boiling points

    • Tend to gain electrons

    Metalloids aka semi metals
    Metalloids aka Semi-Metals a cation

    • Found along both sides of zigzag line, with exception of Al and Po

    • Properties of both metals & nonmetals

    • Okay conductors of heat & electricity

    • Shiny or dull

    Who am i
    Who am I? a cation

    • Use the clues and a periodic table to predict the element.

    • The number of clues is shown in the lower right corner.

    1 who am i
    1. Who am I? a cation

    • Very good ability to conduct electricity

    • Never found alone in nature

    • When combined with other elements, usually give up 1 valence electron

    • Only one letter in symbol

    4 clues

    2 who am i
    2. Who am I? a cation

    • More valence electrons than oxygen

    • More protons than calcium

    • Fewer protons than krypton

    3 clues

    3 who am i
    3. Who am I? a cation

    • Poor conductor

    • Usually found as a gas

    • Do not bond well with others

    • Sometimes found in signs outside restaurants

    4 clues

    4 who am i
    4. Who am I? a cation

    • Second lowest electronegativity of period

    • One of most reactive in family

    • Not radioactive

    • Add 50 protons and I’m now another element in my family

    4 clues

    5 who am i
    5. Who am I? a cation

    • Usually found as a gas

    • Very reactive

    • Lightest element in family

    • Often form -1 ion

    4 clues

    6 who am i
    6. Who am I? a cation

    • Radioactive

    • Highest atomic radius in family

    • Usually form -2 ion

    3 clues

    7 who am i
    7. Who am I? a cation

    • Never found alone or unbonded in nature

    • Most commonly form +2 ion

    • Second highest number of protons in family

    3 clues

    8 who am i
    8. Who am I? a cation

    • All other members of family are metals

    • Most abundant element in universe

    2 clues

    9 who am i
    9. Who am I? a cation

    • Metals, nonmetals, and semi-metals all found in family

    • Same number of protons as the sum of the protons in the two elements directly above

    2 clues

    10 who am i
    10. Who am I? a cation

    • Highest ionization energy in family

    • Family contains metals, nonmetals, and semi-metals

    • Can form positive or negative ion

    3 clues

    That s all folks

    That a cation’s All Folks!

    Once you have finished, check your answers with a peer.