1. Periodic Table

2. Who created the Periodic Table?
Born : 1834 Died : Nationality : Russian
Occupation : Chemist
Dmitri Mendeleev brought order to the chaos of chemistry by asserting his periodic law, which states that the elements arrange themselves according to their atomic number and their chemical properties.

3. Periods are the horizontal rows of elements
Elements are listed horizontally according to their atomic number - number of protons
Periods are the horizontal rows of elements
Elements are listed vertically according to their chemical properties
Groups or Families are arranged vertically
Halogens - highly reactive, gases except Br liquid
Noble gases – stable, unreactive odourless gases
The Periodic Table provides information
on the physical and chemical properties of elements
Alkali metals - highly reactive, soft, low densities
Alkaline earth metals - burn in air if heated (fireworks)

4. Periodic Table Atomic Mass - mass of average atom
Atomic Number - number of protons & electrons of a neutral atom
Ion Charge - electric charge that forms when an atom gains or loses electrons

6. Reactivity

8. The Atomic Challenge Atomic Number Ion Charge Symbol Name Atomic Mass2-
Symbol
Name
Atomic Mass
Protons
Atomic number equals the number of ____________ and ________________ of an atom.
Electrons
Protons
Atomic mass equals the total number of ______________ and _______________.
Neutrons 8 8
Number of protons_______electrons ______and neutrons ________. 8

9. Atoms of Elements from Periodic Table (Neutral)
Oxygen Atom, O
Zinc Atom, Zn
Lithium, Li 2- 2+ + Zn
Oxygen
Lithium 8 30 3 16 65 7 8 30 3 8 35 4 8 30 3

10. Si Atoms of Elements from Periodic Table Silicon Atom, Si
Boron Atom, B
Bromine, Br - Si Br
Boron 14 5 35 28 11 80 14 5 35 14 6 45 14 5 35