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How to know which element have more reactive when they aren't in same period and group?

How to know which element have more reactive when they aren't in same period and group, for example the Ca and the Pb, and why. Thanks

1 Answer

Relevance
  • 2 months ago
    Favorite Answer

    By looking at the activity series, for example the one in the source below.

    Because the activity series is ordered according to the relative reactivity of its elements.

    Ca is above Pb in the table, so Ca is more reactive.

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