Using the Periodic Table to determine the Atomic Structure of the Elements

ATOMIC STRUCTURE

Periodic Table An Important Tool in Chemistry• For each element

• Classification as metal or non-metal• Structure of the atom

• Properties • Physical properties: size, melting point, conducting electricity

• Chemical properties: how easily it reacts to form new substances

Important Elements to Memorize 1 18

H2 13 14 15 16 17

He

Li Be 3 4 5 6 7 8 9 10 11 12 B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Mn Fe Co Ni Cu Zn Br Kr

Ag Sn I Xe

Au Hg Pb Rn

U

Periodic Table An Important Tool in Chemistry

16

S 32.06

S16

32.06

Organization of the Periodic TableColumns – Groups

All the elements have similar chemical and physical properties

All will chemically react in a similar wayNames of groups

Rows – PeriodsElements have same number of energy levels

Bohr Model Diagrams

RulesIdentify the number

of electrons using the Atomic Number

Place dots as electrons starting from the center

Maximum of electrons

1st =2, 2nd = 8, 3rd =8