Question

Classify the following bonds as ionic, polar covalent, or covalent, and give your reasons: (a) the CC bond in H3CCH3, (b) the KI bond in KI, (c) the NB bond in H3NBCl3, (d) the CF bond in CF4.

Answer 1

Answer: a) the C-C bond in $H_3CCH_3$ : covalent

b) the KI bond in KI : ionic

c) NB bond in $H_3NBCl_3$: polar covalent

d) the CF bond in $CF_4$:  polar covalent

Explanation:

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.

A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms.

An ionic bond is formed when an element completely transfers its valence electron to another element. This bond is formed between a metal and an non-metal.

a) the C-C bond in $H_3CCH_3$ : covalent as there is no diffrence in electronegativity

b) the KI bond in KI : ionic as potassium transfers electron to iodine.

c) NB bond in $H_3NBCl_3$: polar covalent as there is difference in electronegativity

d) the CF bond in $CF_4$:  polar covalent as there is difference in electronegativity