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An element with an incomplete d subshell. Elements which have common cations with incomplete d subshells are also considered transition metals. Elements with incomplete f subshells are sometimes called "inner transition elements."

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16y ago
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12y ago

The Lanthanoids and Actinoids are placed outside the transition Group to differentiate their property of valence electron entering f orbital which subsequently affects their chemical and physical properties as well.

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Q: What elements are outer transition elements in periodic table?
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