Carbon
I would expect Carbon to be the element that forms more compounds than any other element.
The element which has the same oxidation number in all of its known compounds is fluorine. Fluorine always has an oxidation number of -1 in its compounds because it is the most electronegative element.
Mercury, atomic number 80.
Carbon is the element with the highest number of chemical compounds, with millions of known compounds. Its ability to form diverse types of bonds with other elements and with itself allows for a wide range of compounds to be created.
Iodine (I) can form compounds with various elements such as potassium (KI), sodium (NaI), or hydrogen (HI). These compounds are known as iodides.
Elements are often denser than compounds, but not always. In fact the least dense substance known is hydrogen, which is an element.
You think probable to the element carbon.
Calcium is a very active element which forms innumerable compounds. The most familiar one is calcium carbonate, also known as limestone.
Now are known approx. 60 000 000 chemical compounds; all element can form more or less compounds.
The element that is part of both non-flammable compounds in a table is helium. It is a noble gas that is known for being chemically inert and non-flammable.
Radon is a practically inert chemical element, only some compounds are known now.
A non-example of a element is water, wood, carbon dioxide, plastic,and ice.'Non-examples' are also known as compounds.