Chemical Bonding Part 1

The proton number of atom T is 18. Based on its electronic, choose the CORRECT Lewis symbol for the atom:

• A

• B

• C

• D

The following statements are incorrect about octet rule, EXCEPT

• Molecules or polyatomic ions with atoms that have generally contain the lighter s- and p-block are tends to achieve octet configuration

• The aim of the octet rule is to form the strongest covalent bond.

• Octet rule is a tendency of molecules and polyatomic ions to have structures in which each atom is surrounded by eight valence electrons.

• All molecules or polyatomic ions with atoms that found for elements of period 3 and beyond will obey octet rule

Which of the following is NOT the exceptional to octet rule:

• OF₂

• SnCl₂

• ClO₂

• BBr₃

Which one of the following violates the octet rule?

• PCl₃

• CBr₄

• NF₃

• XeF₄

Which of the following statements contrasting covalent bonds and ionic bond is correct?

• Covalent bonds usually involve two nonmetals and ionic bonds usually involve two metals.

• Covalent bonds usually involve two metals and ionic bonds usually involve a metal and a nonmetal.

• Covalent bonds usually involve a metal and a nonmetal and ionic bonds usually involve two nonmetals.

• Covalent bonds usually involve two nonmetals and ionic bonds usually involve a metal and a nonmetal.

Which of the following compounds has an electrovalent bond?

• H₂O

• NH₄Cl

• CH₃Cl

• CH₃Li