Answer:
The four facts about elements are:
1) Many elements occur naturally, but some are man-made or synthetic. The first man-made element was technetium.
2). Elements are listed in order of increasing atomic number (number of protons) on the periodic table. The periodic table arranged elements according to periodic properties or recurring trends in the characteristics of the elements.
3) Over three-quarters of the known elements are metals. There are also a small number of nonmetals and elements with properties in between those of metals and nonmetals, known as metalloids or semimetals.
4) There are different forms of pure elements, called allotropes. Examples of allotropes of carbon include diamond, graphite, buckminsterfullerene, and amorphous carbon. Although they all consists of carbon atoms, these allotropes have different properties from each other.