1. DO NOW: REVIEW FROM YESTERDAY: You need your reference table… Name the element
Period 7, group 1
Period 4, Halogen family
2 energy shells, Alkaline Earth Metal
Noble gas, period 2
3 valance electrons, period 3
6 valance electrons, 3 energy shells
1 energy shell, 2 valance electrons
Row 4, Carbon Family

2. What is the periodic table?
compact way of organizing elements
contains a lot of information
allows us to make predictions about behaviour and properties of elements
Elements

4. Periodic Law
There is a periodic repetition of chemical and physical properties of elements when arranged by increasing atomic number

5. Classifying the Elements
75% of elements are metals
Remaining elements: non-metals & metalloids (semi-metals)
Staircase:
dividing line between metals & nonmetals
elements to left are metals
elements to right are non-metals

7. Properties of Metals Malleable – flattened into sheets
Ductile – drawn into wires & tubes
have Luster
Good Conductors of heat & electricity
Solid at room temperature (except Hg)
Metals lose electrons & form positive ions “Metals are losers”

8. So…metals don’t want electrons, they want to get rid of them

9. METALS MOST REACTIVE METAL (MOST METALLIC) = BEST LOSER LIQUID SOLIDSHg

10. Properties of Nonmetals
generally gases or solids (except Br2)
solids are Brittle
solids are Dull
poor conductors of heat & electricity
Nonmetals gain electrons & form negative ions “Nonmetals are winners”

11. So…nonmetals love electrons, they want to take electrons

12. NONMETALS METALS Non-reactive – they have all 8 valance electrons
LIQUID
NONMETALS
SOLIDS
METALS
MOST REACTIVE
NONMETAL
MOST REACTIVE METAL (MOST METALLIC) = BEST LOSER Br Hg
Non-reactive
– they have
all 8
valance electrons

13. Most elements are solid at room temperature
Liquids (only 2 at room temp.)
Br2 (non-metal) and Hg (metal)
GASES
Elements that are gases at STP are… Diatomics: They don’t like to be alone so they always pair up!
H2, N2, O2, F2, Cl2
Monatomics: noble gases He, Ne, Ar, Kr, Xe, Rn

14. NONMETALS METALS Non-reactive – they have all 8 valance electrons
LIQUID
GASSES
NONMETALS He H
SOLIDS N O F Ne
METALS Cl Ar
MOST REACTIVE
NONMETAL
MOST REACTIVE METAL (MOST METALLIC) = BEST LOSER Br Kr Xe Hg Rn
Non-reactive
– they have
all 8
valance electrons

15. Properties of Metalloids
Each metalloid has some metallic and some nonmetallic properties
Example:Si
shiny like metal but brittle like nonmetal