Question

1. which element would form non-polar, covalent bond with carbon?

□ calcium
□ sulphur
□ oxygen
□ bromine

Explanation:

To form a non - polar covalent bond with carbon, the element should have an electronegativity value very close to that of carbon (carbon has an electronegativity of about 2.5).

• Calcium is a metal and forms ionic bonds, not covalent bonds, with non - metals like carbon.
• Oxygen has an electronegativity of about 3.5, which is significantly different from carbon's electronegativity, so the C - O bond is polar covalent.
• Bromine has an electronegativity of about 2.8, which is different enough from carbon's 2.5 to create a polar covalent bond.
• Sulphur has an electronegativity of about 2.5, which is almost the same as carbon's. So, when carbon bonds with sulphur, the electron pair is shared equally (or almost equally) between the two atoms, forming a non - polar covalent bond.

Answer:

sulphur