(19) Answer the following question by selecting from the
given elements
6C, 80, 10Ne,11Na, 14Si
(a) elements belong to same period.
(b) elements belong to same group explain with reason.
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Answer:(a) C , O and Ne belong to period 2 and Na , Si belong to period 3
Explanation:(b) elements C ,O and Ne have two shellds in its atom whereas element Na and Si have three shells in its atom
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