Sulphur (S) and Chlorine (CL)
Metals and non-metals are the two primary categories of elements.
If you mean what two element types then: Metals and non-metals If not, I do not know what you are asking
Two or more types of metals or non metals combine to form an alloy.
Metal - Non metals
Metal
The two patterns include metals and non-metals. metals are placed on left and non-metals on right side.
There are many types of metals you get ferrous and non ferrous metals. A magnet will stick to ferrous metals such as iron and steel but wont stick to non ferrous metals like copper or alluminium.
plastic
metals, metalloids and non-metals solids, liquids and gases
A metal and a non metal. Two non metals. A metal and a metalloid.
If you are referring to the periodic table, then metals and non-metals, though if that is the case I should remind you that metalloids are also a category. Though if you were asking more broadly about molecules, as this category would suggest, you're probably looking for organic and inorganic.
metals and non-metals