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P-1 Periodic Classification of Element — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-1 Periodic Classification of Element1 Mark
Question
Three elements with filled outermost shell.
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Answer

(i) Helium (2) (ii) Neon (2,8) (iii) Krypton (2,8,18,8).

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