Pyrophosphate has the chemical formula (P2O7)-4.
It is a class of chemical anions that were originally formed from heating (pyro) phosphates.
They are formed by esterification of two phosphates (linking them with one of the phosphate oxygen atoms).
Iron and oxygen
The four elements that make up 95 percent of the Earth's mass are oxygen, silicon, iron, and magnesium. These elements are abundant in the Earth's crust and core, contributing to its overall composition.
The seven elements that make up the universe are hydrogen, helium, oxygen, carbon, nitrogen, iron, and silicon. These elements are the building blocks of all matter in the universe.
The three elements that make up most of Earth's mantle are oxygen, silicon, and magnesium.
The 8 main elements of the Earths crust are, Oxygen. Silicon. Alluminium. Iron. Calcium. Sodium. Potassium. Magnessium.
Iron is, itself, and element. It is not a compound of two elements.
iron and sulfur
Iron and oxygen
Iron (Fe) and Sulfur (S) make up Iron Sulfide.
Iron and chlorine are the elements that make up ferrous chloride.
Iron and carbon.
Iron and oxygen
Iron (Fe) and oxygen (O) are the elements that make up Fe2O2. The chemical formula Fe2O2 indicates that there are two iron atoms bonded with two oxygen atoms.
Three chemical elements make up the Iron Triad, iron (Fe), cobalt (Co) and nickel (Ni).These three elements are sometimes given the name Iron Triad because they have some similarities in properties and are located together in the Periodic Table.
No elements are made up of a compound. I think you mean 'Which elements make up iron oxide?', and the answer to that is iron and oxygen.
iron and nickel
Heavy (or dense) ones ...mostly iron.