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1. The elements whose atoms have completed outermost shell, are called,
(i) Non-metals
(ii) Noble gases
(iii) Metalloids
(iv) Metals

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Answered by Anonymous

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$\tt\implies$ (ii) Noble Gases

Helium (He), neon (Ne), and argon (Ar), as group 18 elements, have outer electron shells that are full or satisfy the octet rule. This makes them highly stable as single atoms. Because of their non-reactivity, they are called the inert gases or noble gases.

Answered by ItzUnic0rns

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1. The elements whose atoms have completed outermost shell, are called, (i) Non-metals (ii) Noble gases (iii) Metalloids (iv) Metals

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1. The elements whose atoms have completed outermost shell, are called,
(i) Non-metals
(ii) Noble gases
(iii) Metalloids
(iv) Metals