A chemical change occurs when matter undergoes a change to form a new substance with different chemical properties, and the reaction is usually not reversible.
In the case of burning methane gas (CH4) ,oxygen and methane are the reactants, while the new substance formed from the reaction are carbondioxide (CO2) and water (H2O) .
Ion: forms when a neutral atom loses or gains electrons. Polar molecule: a chemical species in which the distribution of electrons is not even. Subscript: each element of an array is accessed by a number. Coefficient: a number used to multiple a variable.
To see if an equation is balanced, make sure that each side of the reaction has an equal number of the types of atoms. The one that has a mismatch is A
