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The Periodic Table (Important people who worked on PeriodicTable…
The Periodic Table
Important people who worked on PeriodicTable
Mendeleev
Dobereiner
A German chemist, Published a classification system
Lother Meyer
Henry Moseley
Electron Configurations
Each family shares similar properties
The number of electrons in the OUTER MOST Orbital dictate properties
Example
Group 18 - Filled and Stable
Group 1- 1e- / UNSTABLE
Atomic Radius vs. Atomic Number
PT. L -> R Element gets smaller
PT. T -> B Element gets bigger
H - Smallest
Fr - Largest
Examples
Ionization Energy
Define:
The amount of energy needed to remove and eletron
Trend:
L -> R -Energy is increased
T -> B - Energy is decreased
Electronegativity
Define:
The ability to attract other electron
Trend:
Nonmetals have larger Electronegativity
Metals will have a low Electronegativity
Periodic Law
Families on the Periodic Table