204Tl, syn, 3.78 y, β · Pb · ε · Hg. 205Tl, 70.5%, stable. Category: Thallium · view · talk · edit. | references. Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray ... The radioisotope thallium ...
Polar solvents because polar substances<span> are likely to </span>dissolve<span> in </span>polar<span> solvents.</span>
Answer:
to become a noble gas element P will have 2 electrons in it's outer most energy level if it has one energy level
and eight in the last energy level if more than one
Oxygen is a pure substance, as it is composed of only a single kind of atom. Which is the oxygen atom, it cannot be broken or degraded down any further into constituents that make up the element. In terms of both chemically and physically.