1. Periodic Table

2. What the PT really looks like

3. People
Mendeleev-Russian scientist that published the first modern PT based on atomic mass.
Moseley-British scientist that rearranged the PT by atomic number

4. Element Squares Symbol-1, 2 letter abbreviation Element name
Atomic Number-p+, e-
Atomic mass-Average mass of p+ and n in nucleus (Mass #) 6 C
Carbon
12.01

5. Periods Horizontal rows 7 periods
Periods correspond w/ # of energy levels an element has
The lanthanide and actinide series (on bottom) are pulled out and placed on the bottom to save space.

6. Groups/Families Vertical columns 18 groups
Also called families because each group has similar properties because they have the same # of e- in the outer energy level.

7. Metals Shiny Solid Good conductors of heat and electricity Malleable
Ductile
High Density
Almost 90 metals
Left side of PT (except Hydrogen)

8. Nonmetals Dull (not shiny) or powdery Can be S, L, or Gas
Poor conductors of heat/electricity
Can’t be pounded (brittle)
Not ductile (wires)
Usually low density
Less than 20
Right side of PT (except Hydrogen)

9. Metalloids Shiny or dull Solid
Often used as semiconductors in computers
Not malleable
Not ductile
Density varies
7 (shaded in)
Along stair step (not Al)

10. Alkali Metals Group 1 Highly reactive-never alone in nature
Soft, shiny, silver-white
Good conductors Li
Lithium Na
Sodium K
Potassium Rb
Rubidium Cs
Cesium Fr
Francium

11. Alkaline Earth Metals Group 2 Highly Reactive
Soft, silver-white, shiny
Give off bright colors when burned Be
Beryllium Mg
Magnesium Ca
Calcium Sr
Strontium Ba
Barium Ra
Radium

12. Transition Metals Found in middle of PT Groups 3-12
Not as reactive as alkali metals
Good for use in jewelry, pots, etc because not as reactive

13. Halogens Group 17 Very reactive nonmetals Mostly gases F Fluorine Cl
Chlorine Br
Bromine I
Iodine At
Astatine

14. Noble Gases Group 18 Unreactive gases Also called “inert” He Helium Ne
Neon Ar
Argon Kr
Krypton Xe
Xenon Rn
Radon

15. Lanthanide Series Classified as Rare Earth Metals
Found naturally on earth
Soft, silver-white malleable metals with high luster (shine) and conductivity.
Very reactive
Found on bottom of PT

16. Actinide Series
Most are radioactive
Most are man made

17. Diatomic Elements H2 He
In found in nature, always combined with themselves Li Be B C N2 O2 F2 Ne Na Mg Al Si P S S
Cl2 Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br2 Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I2 Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Tl Pb Bi Po At Rn Fr Ra Ac Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr