Question

consider a hypothetical compound formed between element x (electronegativity = 0.9) and element y (electronegativity = 3.5). what type of bond is most likely to exist between x and y?
nonpolar covalent bond
ionic bond
polar covalent bond
metallic bond
which of the following best describes the nature of bonding in a network solid like diamond (composed of only carbon atoms)?
ionic bonding between carbon ions
a network of strong covalent bonds between carbon atoms
metallic bonding with delocalized electrons
weak intermolecular forces holding individual carbon molecules together

Explanation:

Step1: Calculate electronegativity difference for first question

$\Delta\chi=3.5 - 0.9=2.6$

Step2: Determine bond type based on difference

Since $\Delta\chi> 1.7$, it is an ionic bond.

Step3: Recall bonding in diamond for second question

Diamond is a network - solid of carbon atoms with strong covalent bonds between them.

Answer:

1. B. Ionic bond
2. B. A network of strong covalent bonds between carbon atoms