You have actually most likely heard the terms “hard water” and “soft water” You may wonder what determines the hardness or softness of water and whether one kind of water is healthier or much safer to drink than the other.
There has been a wide range of atomic models throughout the history of atomic physics, that refers primarily to a period from the beginning of the 19th century to the very first half of the 20th century. Here are some standard atomic models.
The elements of Group-13 to Group-17 when permitted to react with each other, they form a chemical bond by mutual sharing of their valence shell electrons. This type of bond, which is formed due to the mutual sharing of electrons, is called a covalent bond.