Question

The valence electronic configurations of two elements are $4s^1$ and $3s^{2}3p^5$ respectively. The type of bond expected to be present between them is:

• A. polar covalent bond
• B. non-polar covalent bond
• C. metallic bond
• D. ionic bond

Answer 1

The correct option is D ionic bond

One elements has $4S^1$ electronic configuration(K). It has very low ionization potential i.e it can easily donate single electron.

While other elements having $3S^2$$3P^5$ electronic configuration(Cl) has highest electronic affinity among all elements i.e, it can very easily accept the transfered electron.

So, Between them ionic bond will form.