Periodic Trends
Property Period (Left to Right) Family (Top to Bottom)
Metallic properties Decrease Increase
Atomic # I I
Atomic radius D (except noble gases) I
Positive oxidation # I (to carbon family) satys the same
negative oxidation # D (from carbon family) stays the same
ionic radius (for + & -) D (+, to C) I (-, from C) I
electronegativity I (Except noble gases) D
first ionization energy I D
ability to act as a reducing agent D I
ability to act as an oxidizing agent I D
ability to form acids I I
ability to form bases D I
activity of metals (*) D I
activity of non-metals (*)(except noble gases) I D
atomic weight I I
* moving away from the staircase
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