Given below are two statements one is labeled as Assertion A and the other is labeled as Reason R:

           Assertion A: The amphoteric nature of water is explained by using Lewis acid/base concept

           Reason R: Water acts as an acid with NH₃ and as a base with H₂S

           In the light of the above statements choose the correct answer form the options given below:

He₂ has zero bond order hence it does not exist.

The three fundamental laws of chemistry are - Law of Definite Proportions, Law of Conservation of Mass, and Law of Multiple Proportions.

The three types of chemical bonds are - ionic, metallic and covalent bonds. When the electrons transfer between the atoms, they form the Ionic bonds by producing charged ions that are attracted to each other. When atoms share electrons, covalent bonds are created. When metal atoms share a sea of del