14) Which of the following compounds is formed by covalent bonding? a) Na_(2)S b) AlCl_(3) c) CH_(4) d) LiCl

The correct answer is c) .Covalent bonding occurs when atoms share electrons to form a molecule. In the case of (methane), the carbon atom shares electrons with four hydrogen atoms to form a covalent bond. This results in the formation of a stable molecule with a tetrahedral shape.On the other hand, the other options listed are formed by ionic bonding:a) (sodium sulfide) is formed by the transfer of electrons from sodium atoms to sulfur atoms, resulting in the formation of positively charged sodium ions and negatively charged sulfide ions.b) (aluminum chloride) is formed by the transfer of electrons from aluminum atoms to chlorine atoms, resulting in the formation of positively charged aluminum ions and negatively charged chloride ions.d) LiCl (lithium chloride) is formed by the transfer of electrons from lithium atoms to chlorine atoms, resulting in the formation of positively charged lithium ions and negatively charged chloride ions.Therefore, the compound formed by covalent bonding is .