Question

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17. Two elements X and Y have atomic numbers 12 and 16 respectively. To which period of the
periodic table do these two elements belong? What type of bond will be formed between them and
(ii) How will the concentration of H3O+ ions change on dilution?
why? Also, give the chemical formula of the compound formed.
18 (i) Create a terrestrial food chain depicting four trophic levels.
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Answer 1

diduct it etc........................