Question

why Cus and Cacl2 are not covalent​

Answer 1

Answer:

CaCl2 and NaCl are not covalent. They are ionic compounds which means both transfer their valence electrons to the Halogens group 17 elements. Since group 1 metals are the most reactive and Sodium (Na) is in group 1, therefore NaCl is more ionic than CaCl (Calcium-Ca) is in group 2-with 2 valence electrons.

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Answer 2

CaCl2 and NaCl are not covalent. They are ionic compounds which means both transfer their valence electrons to the Halogens group 17 elements. Since group 1 metals are the most reactive and Sodium (Na) is in group 1, therefore NaCl is more ionic than CaCl (Calcium-Ca) is in group 2-with 2 valence electrons...

CuS. ... Thus,  CuS, cation is same so covalent character is decided by anion. Because sulphur is larger in size than oxygen, therefore according to fajan's rule, CuS is more covalent whereas in MgCl.

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