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Periodic Table (Trends (Electron Configurations (The number of electrons…
Periodic Table
Trends
Electron Configurations
Each family shares similar properties.
The number of electrons in the OUTER MOST Orbital dictate properties.
Examples:
Group 1 - 1e / UNSTABLE
Group 18 - Filled and stable
Atomic Radius vs Atomic Number
PT: L->R Element gets smaller.
PT: T->B Element gets Bigger.
H - Smallest
Fr - Largest
Ionization Energy
Def.
The amount of energy needed to remove an electron.
Trend
L->R - Energy need increases
T->B - Energy need decreases
Electronegativity
Def.
The ability to attract other electrons.
Trend:
Nonmetals will have a higher electronegativity.
Metals will have a low electronegativity.
Important people that worked on the Periodic Table
Henry Mosely
Dobreiner
Mendeleev
Lothar Meyer
Families on the Periodic Table
Periodic Law