An atom of plutonium contain protons, neutrons and electrons - not other elements.
Basically, all (or most) of the elements found in the periodic table, up to plutonium.
Calcium (Ca) and Oxygen (O) are the two elements that make up calcium oxide.
There are many reactive elements. They show up more on the upper left of the Periodic Table. Some of these are plutonium, uranium, Mercury and lead.
There are two elements that make up the compound NaBr, or sodium bromide. These two elements are sodium and bromine.
PotassiumFluorine
Hydrogen and fluorine are the two elements that make up hydrogen fluoride (HF).
The two elements that make up most of the oceans are hydrogen and oxygen, forming water molecules.
two or more different elements
Iron and oxygen
Power and legitimacy
A molecule of water, which has the formula H2O, is made up of the elements hydrogen and oxygen.
Elements that occur naturally in nature include hydrogen, helium, oxygen, carbon, nitrogen, and others. These elements make up the building blocks of all matter in the universe and are found in various compounds and substances on Earth and beyond.