Elements which have completely filled outermost shell and do not combine with other elements are called:
Correct answer: D. Rare earth elements
- A. Metal elements
- B. Reactive elements
- C. Unstable elements
- D. Rare earth elements
Explanation
Rare Earth elements are those which rarely combine with other elements to form compounds and are unreactive. They are a set of 17 metallic elements;including the 15 lanthanides along with Scandium and Yttrium and are further classified as heavy and light rare Earth elements.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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