Periodic Trends

Atomic Radius
how big an atom is
Down a Group: increases
Left to Right: decreases
Electron Affinity
energy change that occurs when an electron is added to an atom
down: decreases
left to right: increases
Reactivity
Metals:
Down a Group: increases
Left to Right: decreases
NonMetals:
Down a Group: decreases
Left to Right: Increases
Ionization Energy
energy needed to remove an electron from an atom
Down a Group: decreases
Left to Right: increases
Electronegativity
ability of an atom IN A CHEMICAL BOND to attract electrons
Down: Decreases
Left to right: increases
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