3. Determine the type of bonding in the following materials. a) Fe b) CuAl (Duralumin) c) H2O d) Al2O3 e) He

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Answer 1

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a) Iron has metallic bonding. All metals have metallic bonding, Metallic bonds are very strong and require very high energy to break and that is why they have high melting and boiling point.

b) CuAl is an alloy thus it also has metallic bonding.

c) in H2O molecule, Bond between H and O is covalent. But different water molecules are held together by hydrogen bonding.

d) Al2O3 is a compound that is neither purely covalent not purely ionic. Due to the high electronegativity difference between the elements Al and O, the compound is more ionic than covalent.

e) He is a Noble gas and has a completely stable electronic configuration, that is why It is inert and does not bond with itself or any other element. (He does show Vander Waal attractions, but it is completely different from chemical bonding)

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