Chemistry of Matter

Document Sample
Chemistry of Matter Powered By Docstoc
					                Catalyst
• Answer the following questions in your
  daily work organizer:
1. On the periodic table, in what order are
  the elements arranged?
2.What does periodic table “group” mean?
3.What does periodic table “period” mean?
4.List a metal, a nonmetal, and a semimetal.
         Catalyst: Answers
1. The elements are arranged from smallest
  atomic number (# of protons) to largest.
2.A “group” is a column.
3.A “period” is a row.
4.Metal – element on the left of the table
  (except H).
  Nonmetal – element on the right of the
  table or H.
  Semimetal – B, Si, As, Ge, Sb, Te
               Objectives
• I can locate, compare and contrast alkali
  metals, alkaline earth metals and transition
  metals.
• I can locate the lanthanide, actinide, and
  transuranium elements in the Periodic
  Table.
                Agenda
• Catalyst
• Notes & Practice: Valence Electrons
• Periodic Table Groups: Coloring, Group
  Work and Sharing
• Exit Slip
 Guided Notes:
Valence Electrons
   Electron Energy Levels
Within the electron cloud, electrons are
arranged in energy levels.
We draw the energy levels as rings around
the nucleus.
1
2
3
4
5
6
7




Write: periods tell us energy levels
Period 1
Period 2
Period 3
                                   3 45678
  12

Write: groups tell us # valence electrons
 What are valence electrons??
• Valence electrons are electrons on the
  outer shell of an atom that are available
  for bonding

  – Valence Electrons are VERY IMPORTANT,
    they determine an element’s reactivity and
    general characteristics
Group 1
Group 2
Group 13
                Practice!
• Work with the person next to you to
  complete # 15 and # 16.
16. Answer the questions below based on the elements in question #15.
(1) Which elements had a filled outermost shell? _____ _____
(2) Which element would be most likely to lose electrons in a chemical bond? _____
(3) Which element would be most likely to gain electrons in a chemical bond? _____
(4) Which elements are not likely to bond with other elements? _____ _____ Why? ________________
                Agenda
• Catalyst
• Notes & Practice: Valence Electrons
• Periodic Table Groups: Coloring, Group
  Work and Sharing
• Exit Slip
  Periodic Table “Families”
          (groups)
Materials:
• Periodic table that you colored on
     Wednesday
•Textbook pp. 124
•New periodic table groups chart.
     Periodic Table “families”
             (groups)
• Within the 3 major groupings of elements
  (metals, semi-metals, non-metals), there
  are more SPECIFIC groups that share
  properties.

• The elements share properties because
  they have the same number of VALENCE
  ELECTRONS.
• Remember:

• VALENCE electrons: electrons that are in
 the OUTERMOST shell of an atom. They
 are the electrons available for CHEMICAL
 BONDING.
     Group 1: The Alkali Metals
•   Have ONE valence electron.
•   VERY REACTIVE
•   Therefore, not found alone in nature.
•   What are the alkali metals?
    – Li, Na, K, Rb, Cs, Fr

• On your periodic table, use a marker to
  outline the Alkali Metals. Make a key to
  indicate what color marker represents the
  alkali metals.
    Group 2: The Alkaline Earth
              Metals

• Have TWO valence electrons.
• VERY REACTIVE
• Usually not alone uncombined in nature.
• What are the Alkaline Earth Metals? Be,
  Mg, Ca, Sr, Ba, Ra
• On your periodic table, use a marker to
  outline the Alkaline Earth Metals.
    Groups 3-12: Transition
           metals


• Properties vary.
• Some found alone in nature: Gold,
  Silver, Platinum, Copper, etc.

• On your periodic table, use a marker
  to outline the transition metals.
        Group 17: Halogens
• Have SEVEN valence electrons.
• Most REACTIVE non-metals.
• What are the Halogens? F, Cl, Br, I, At

• On your periodic table, use a marker to
  outline the Halogens.
  Group 18: The Noble Gases
• Have EIGHT valence electrons.
• They are very NON-REACTIVE (Like to
  exist alone).
• What are the Noble Gases? He, Ne, Ar,
  Kr, Xe, Rn

• On your periodic table, use a marker to
  outline the Noble Gases.
    Lanthanides and Actinides
• The lanthanides are actinides are transition
  metals.
• They are part of period 6 and 7, however
  they are placed below the table so that it fits
  on one page.
• Locate the atomic numbers of the
  lanthanides and actinides. You will notice
  that they fill in the gaps in atomic numbers
  between Ba & Hf and Ra & Rf.
• On your periodic table, use a marker to
  outline the Lanthanides and actinides.
     Transuranium Elements
• These are elements listed after Uranium
  (92) on the periodic table.
• Transuranium elements were synthesized
  and identified in laboratory experiments
  through the use of nuclear accelerators.
• They are not naturally found on earth.
• On your periodic table, use a marker to
  outline the transuranium elements.
     Group Reading Assignment
•   Number off 1 – 5.
•   Group 1: Nobel Gases (p. 127)
•   Group 2: Halogens (p. 126-127)
•   Group 3: Alkali Metals (p. 125)
•   Group 4: Alkaline Earth Metals (p. 126)
•   Group 5: Transition Metals (p. 128-129)
•   You will read about your group elements
    and present to the members of the other
    groups sitting around you.
     Answer these questions in
            your chart.
1. What is the group name?
2. What are all of the elements included?
3. Are you part of the metals, semi-metals, or
   non-metals?
4. How many valence electrons does each
   element possess?
5. Please present two more facts or examples
   from the textbook.

• Then share with the people at your table and
  take notes on the other element groups.
                Agenda
• Catalyst
• Notes & Practice: Valence Electrons
• Periodic Table Groups: Coloring, Group
  Work and Sharing
• Exit Slip

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:1
posted:4/30/2014
language:English
pages:33