There is a couple different ways to determine if<span> a </span>bond<span> is </span>ionic or covalent<span>. By definition, an </span>ionic bond<span> is between a metal and a nonmetal, and a </span>covalent bond<span> is between 2 nonmetals. So you usually just look at the periodic table and </span>determine whether<span> your compound is made of a metal/nonmetal or is just 2 nonmetals</span>
Technetium, with atomic number denoted Z43, is the lowest-numbered element in the periodic table of which all isotopes are radioactive
