Elements not found in nature synthesized in nuclear reactions and involving the completion of 51 orbital are known as.
Correct answer: D. Actinides
- A. Lanthanides
- B. Transition elements
- C. Rate gases
- D. Actinides
Explanation
Actinides are a series of chemical elements that span from atomic number 89 (actinium) to 103 (lawrencium) on the periodic table. They are part of the f-block and are characterized by the filling of the 5f orbitals in their atomic structure. Actinides are synthetic elements, meaning they are not found in nature but can be synthesized in nuclear reactions. Completing the 5f orbitals involves the filling of 14 orbitals.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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