Which is a polar covalent bond? PbCl2 or CS2?

PbCl2 = lead ions and chloride ionsCS2 in a linear molecule (like CO2) and it is non-polar because of the shape.

To determine which compound has a polar covalent bond between its atoms, we need to consider the electronegativity difference between the elements involved.

In PbCl2 (lead(II) chloride), lead (Pb) has an electronegativity of 1.87, while chlorine (Cl) has an electronegativity of 3.16. The electronegativity difference is 3.16 - 1.87 = 1.29.

In CS2 (carbon disulfide), carbon (C) has an electronegativity of 2.55, while sulfur (S) has an electronegativity of 2.58. The electronegativity difference is 2.58 - 2.55 = 0.03.

A general rule is that a difference in electronegativity greater than 0.4 indicates a polar covalent bond. Therefore, PbCl2 has a polar covalent bond due to its electronegativity difference of 1.29, while CS2 has a nonpolar covalent bond due to its electronegativity difference of 0.03.

To determine whether a bond is polar or nonpolar, you need to consider the electronegativity difference between the atoms involved in the bond.

Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. When atoms with different electronegativities combine, a polar covalent bond is formed.

In the case of PbCl2, Pb is the symbol for lead, and Cl is the symbol for chlorine. The electronegativity of chlorine is 3.16, while the electronegativity of lead is 1.87. The electronegativity difference (3.16 - 1.87) is 1.29, which is not very significant. Thus, the Pb-Cl bond is considered to be a polar covalent bond.

Now, let's consider CS2. C is the symbol for carbon, and S is the symbol for sulfur. The electronegativity of carbon is 2.55, while the electronegativity of sulfur is 2.58. The electronegativity difference (2.58 - 2.55) is only 0.03, which is negligible. Therefore, the C-S bond is considered to be a nonpolar covalent bond.

In conclusion, PbCl2 (lead chloride) has a polar covalent bond, while CS2 (carbon disulfide) has a nonpolar covalent bond.