The General Periodic Trends

Understand the gerenal trends demonstrated by the five periodic properties requies us to put together our understanding of the trends definitions and the changes in atomic structure across and down the table.

The trends

The trends themselves are simple to state:

Ionization Energy increases up and to the right

Electron Affinity increases up and to the right

Electronegativity increases up and to the right

Atomic Radius increases down and to the left

Ionic Radius increases down. Going across, it intially decreases, then increases dramatically, then decreaes again.

Much more interesting is why these trends are what they are.
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