Certain Characteristic Properties Of Elements Can Be

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Elements Which Are Similar As Regards Their Chemical Properties Have Atomic Weights Which Are Either Of Nearly The Same Value (eg. Pt, Ir, Os) Or Which Increase Regularly (eg. K, Ru, Cs).

Certain Characteristic Properties Of Elements Can Be Foretold From Their Atomic Weights.

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When The Elements Are Arranged In Vertical Columns According To Increasing Atomic Weight, So That The Horizontal Lines Contain Analogous Elements Again According To Increasing Atomic Weight, An Arrangement Results From Which Several General Conclusions May Be Drawn.