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Why Metallic character goes on decreasin...

Why Metallic character goes on decreasing while going from left to right in a period?

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(i) Metallic character is the tendency of an atom to lose electrons.
(ii) In a period, electrons are added to the same shell and hence, these electrons experience greater pull from the nucleus. As a result outermost shell comes closer to nucleus, atomic size decreases.
(iii) Thus it becomes difficult to remove an electron from the outermost shell. of an atom. Hence, metallic character decreases from left to right in a period.
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Which one of the following is true about metallic character when we move from left to right in a period and top to bottom in a group?

What is the causes of non - metallic character of elements ? What is the expected treand in the variation of non - metallic character of element form left to right in a period ?

Assertion (A): Atomic radius tends to decrease across a period. Reason (R): As we move from left to right along a period, the valence electrons are added to the same shell, nuclear charge increases and atomic radius decreases.