1. Agenda Bell Work
• Periodic Trends • Have Chp 17 HW out to
be checked
• Notes: Periodic
Table • Pick up Crossword
Puzzle from front desk
HW: Chp 18 pg 308-
313, 317-318 • Complete using periodic
table
Chp 17-18 “Quest”
Tuesday

2. Periodic Table
January 2, 2013

3. Objectives
1. Describe the structure of the periodic
table
2. Distinguish between metal, nonmetal,
metalloid
3. Identify and describe properties of
halogens, noble gases

4. Organization of the Table
 Tells about the elements structures,
and how they behave
 Grouped as metals, nonmetals, and
metalloids

6. Metals
 shiny, opaque, and
good conductors of
electricity and heat

7.  Malleable –
Hammered or bent
into different shapes
without breaking

8.  Ductile – can be drawn into wires

9.  Most metals are solids at room
temperature except; Hg, Ga, Cs, Fr
– Mercury
– Gallium
– Cesium
– Francium

10. Nonmetals
 Poor conductors of electricity and
heat
 May be transparent
 Brittle and shatter when hammered

11.  Solid, C
 Liquid, Br
 Gaseous, He

12. Metalloids
 Six elements
 B, Si, Ge, As, Te, Sb
 Found between metals
and nonmetals

13.  Both metallic and nonmetallic
properties
 Weak conductors of electricity
 Used for electronic equipment, rocket
fuel, detergents, optical equipment

14. Organization of the Table
 Periods – horizontal row
 Group(family) – vertical column
 7 periods
 18 groups

15. Periodic Trend
 Gradual change of atoms across any
period
 Ex. Atomic size gets smaller from left
to right
 Each period represents a full cycle -
periodicity

16.  What trends do your melting points, and
densities show?

17. Groups
 Properties tend to be similar
 Electrons lost or gained give these
properties

18. Group 1 – Alkaline
– found ashes mixed in water
produce a slippery solution
– Arabic for al-qali – ashes
– Used for soaps
 Brainaic Alkaline Metals

19. Group 2 - Alkaline Earth Metals
– Form basic (alkaline) solutions when
mixed with water
– Do not melt or change in fire – known to
alchemists as “earth”

20. Group 16 – Chalogens
– “ore-forming” – sulfur and Polonium are
commonly found in ores
Group 17 – Halogens
– “salt-forming” – forms various salts
– Halogen lamps – iodine and bromine
– Comparing Halogens

21. Group 18 – Noble gases
– Unreactive, tend not to combine with
other elements
– Noble Gas Balloons

22. Group 3 through 12 – Transition
Metals
– Harder than alkaline metals, Less
reactive with water
– Named for their central position

23. Inner transition Metals
 Sixth Period – Lanthanides
– Found mixed together in the same locations
– Difficult to purify
 Seventh Period – Actinides
– Heavier than Uranium are synthesized in a
laboratory

24.  With the periodic table as your guide,
describe Se. Use as many of this
chapter’s key terms as you can