The Periodic Table has metals, nonmetals, and metalloids
Metals are on the left side of the stair-step (The stair step is the zig zag pattern of elements between the metals and nonmetals. The elements in the step are metalloids) There's only 1 nonmetal on the metal side and that is Hydrogen which is the the first block. Metals are shiny, and have malleability, ductility, and are good conductors.
Next is Nonmetals are on the right side of the stair-step There's only 1 nonmetal on the metal that is on the metal side and that is Hydrogen. Nonmetals are elements that lack the physical and chemical properties of metals and are generally poor conductors of heat and electricity.
On the Periodic Table each element has an Atomic Number, Atomic Mass, and a Mass Number.
The Atomic Number tells use of many Protons and Electrons that are in that element.
The Atomic Mass tells use the number of Protons and Neutrons that are in that element
The Mass Number is the Atomic Mass rounded
Atomic number = # of Protons and Electrons
Atomic mass = # of Protons + Neutrons
You know the number of electrons in that element because the number of electrons equals the number of protons
When you are trying to Balance Chemical Equations you have to make sure both sides of the equation is equal.
You should list the elements in the same order on both sides of the equation.
The reactants are on the left side of the arrow and the products are on the right side of the arrow in the equation. Reactants are the stuff that's going into the chemical reaction, and the Product(s) are the results of the chemical reaction.
The background is an example of the stuff I just explained and how to balance a chemical equation