Chem - Stoichiometry

Valency

The valency of an element is the number of electrons its atoms lose, gain, or share, to form a compound.

How to write formula of ionic compounds

1. Write symbols of elements.
2. Write the valencies of each element
3. Interchange the valencies

Word equations

Show the reactant and products of a chemical reaction using their full chemical names. They reach with each other to form new substances. Conversion of reactants to products.

The Diatomic Molecules

Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine (Have no fear of ice cold beer)

Ionic Bond

The complete transfer of an electron from a metal atom to a non-metal atom will form an ionic bond between them. Example: Formation of Sodium Chloride

Anions and Cations

The ions with a negative charge are called anions and the ones with a positive charge are called cations.
they get attracted to one another and thereby forming an ionic bond between them.