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What are transition elements and inner transition elements. State the position of the inner transition elements. State why noble gases are considered unreactive elements. |
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Answer» Transition elements – Elements belonging to Group 3 to 12 are called transition elements. Transition elements consists of metals lying between strongly elctropositive metals on a left and least electropositive elements on the right. They all have similar properties. Inner transition elements: Inner transition elements are the elements belonging to Group 3 in 6th and 7th period. They form two series i.e. Lanthanide series and Actinide series. They consists of two Horizontal rows of metals at the bottom of the table. The gases of zero group (Noble gases) are unreactive because they have a stable electronic configuration. |
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