Any element that's not a noble gas has to form compounds, because all non-noble elements have to fill its outer orbital and the only way they can do that is to form compounds--even with themselves, like H2 or O2.
These elements are very reactive.
Two or more different elements that are chemically combined in a definite ratio is a compound. Based on the nature of the bonds, it can be called an ionic compound (i.e. atoms bonded together by ionic bonds) or an molecular compound (i.e. atoms bonded together by covalent bonds).
Absolutely not. The vast majority are found in a combined state in nature. Iron is not found as metal but always as an ore of mixed oxides etc. The halogens and all group 1,2,3 metals are always found combined etc.
Alkali Metals
Alkali metals are not found as pure elements in nature.
Most elements found in nature are in the combined form because of the ionic and hydroqen bondinq.
magnesium :)
Group 3 elements
Two or more different elements that are chemically combined in a definite ratio is a compound. Based on the nature of the bonds, it can be called an ionic compound (i.e. atoms bonded together by ionic bonds) or an molecular compound (i.e. atoms bonded together by covalent bonds).
Mercury is a natural element. It is not man made or combined in nature. It is not a compound.
Absolutely not. The vast majority are found in a combined state in nature. Iron is not found as metal but always as an ore of mixed oxides etc. The halogens and all group 1,2,3 metals are always found combined etc.
Zinc is usually combined with other elements.
Yes, carbon is always combined with something in nature
Sulfur is not a highly reactive element under ordinary condition.
Sulfur is not a highly reactive element under ordinary condition.
Chlorine is never found free in nature. It is always combined with another or other elements into compounds. Chlorine is highly reactive, and it wants to borrow an electron from just anything it can get close to. In general, it actually wants to "steal" that electron to form an ionic bond, and sodium chloride (NaCl), which is table salt, is one example of a common chlorine compound.
Alkali Metals
Because these elements are very Very reactive, especially with water. It wouldn't look nice if these elements were left out with nature. It's very rare to find them left out like that.They are mostly found combined with elements. Like sodium and chlorine make sodium chloride, and potassium and iodine make potassium iodide.