Question

1. which of the following bonds would be best categorized as covalent? i: h - s hydrogen sulfide ii: al - s aluminum sulfide iii: n - f nitrogen fluoride a. i only b. ii only c. iii only d. i and iii e. i, ii, and iii

Explanation:

Step1: Recall covalent - bond criteria

Covalent bonds form between non - metals.

Step2: Analyze bond I (H - S)

Hydrogen (H) is a non - metal and sulfur (S) is a non - metal. So, H - S is a covalent bond.

Step3: Analyze bond II (Al - S)

Aluminum (Al) is a metal and sulfur (S) is a non - metal. The bond between them is more likely to be ionic due to the large electronegativity difference and the nature of metal and non - metal combination.

Step4: Analyze bond III (N - F)

Nitrogen (N) is a non - metal and fluorine (F) is a non - metal. So, N - F is a covalent bond.

Answer:

d. I and III