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CHEMISTRY CH12 Periodic Classification of Elements — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9ScienceCHEMISTRY CH12 Periodic Classification of Elements1 Mark
Question
Complete the following triads by inserting the missing elements.a) Cl, ………., Ib) Li, ………, Kc) Ca, …………, Ba
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Answer

a) Br b) Na c) Sr

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