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Please help me to do the warm up

Please help me to do the warm up-example-1
User Onepiece
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The only thing you need to know is if the elements are metals or nonmetal stocks determine a type of bond. A covalent bond occurs between two nonmetals and ionic is between metal and nonmetal. Therefore 1 and 2 are covalent and 3 is ionic
User Sergej Werfel
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