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Nathanael Thomas periodic table (Families on the periodic table (Metals,…
Nathanael Thomas periodic table
periodic law
Definition
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties
Trends
Electron Configuration
Each Family shares similar properties
the number of the electrons in the OUTER MOST orbital dictate properties
Examples:
Group 18 filled and stable
Group one -1e/unstable
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
Trend: Energy need decreases T->B
Electronegativity
Def: the ability to attract other electrons
Trend: Non metals will have a higher electronegativity
Trend: Metals will have the low Electronegativity
Families on the periodic table
Metals
Non-Metals
Metalloids
Alkali Metals
Alkaline Earth Metals
Noble gases
Halogens
Transition Elements
Lanthanides and Actinides
Important people who worked on the periodic table
Mendeleev
Dobereiner
Lothar Meyer
Henry Mosley