Explain the types of chemical bonds present in H2S, Cu, NH4Cl, and C2H6, and provide reasons for each.

here's an explanation of the chemical bonds in each substance:

• i) H$_2$S (Hydrogen Sulfide)

  • Bond type: Covalent bond
  • Reason: Hydrogen (H) and Sulfur (S) are both non-metals. They form bonds by sharing electrons to achieve stable electron configurations.

• ii) Cu (Copper)

  • Bond type: Metallic bond
  • Reason: Copper is a metal. In metallic substances, the valence electrons are delocalized and form a "sea" of electrons shared among a lattice of positively charged copper ions.

• iii) NH$_4$Cl (Ammonium Chloride)

  • Bond types: Ionic bond and Covalent bond (including dative/coordinate covalent bond)
  • Reason:
    • An ionic bond exists between the ammonium ion (NH$_4^+$) and the chloride ion (Cl$^-$). This is due to the electrostatic attraction between the positively charged polyatomic ion and the negatively charged anion.
    • Covalent bonds exist within the ammonium ion (NH$_4^+$) itself, where nitrogen and hydrogen atoms share electrons. One of these N-H bonds is formed by a dative covalent bond where nitrogen donates both electrons to form a bond with H$^+$.

• iv) C$_2$H$_6$ (Ethane)

  • Bond type: Covalent bond
  • Reason: Carbon (C) and Hydrogen (H) are both non-metals. They form bonds by sharing electrons to achieve stable electron configurations, both between carbon atoms (C-C) and between carbon and hydrogen atoms (C-H).