Brass is on the periodic table?
Brass is not on the periodic table; it is an alloy of copper and zinc.
It is not in the periodic table because it is not an element in its purest form. Rather it is a compound or product of two elements which is why it is not in the periodic table. These types of metals (the ones you have noted) are called alloys which is made by combining two or or metals. For example, bronze is an alloy of copper, with tin as a primary additive to it.