Write the decreasing order for thr following elements (C, K, O, N, Br, F) according to: a) Their electronegativity b) Atomic Radius c) Ionization Energy d) Matallic characteristics notis irgi

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Actinides

The elements in which the extra electron tends to enter the 5f-orbitals of (n–2)th main shell are considered 5f-block elements. They are also named actinides. Actinides include 15 elements, from atomic number 89 to 103.