1.   While perfect certainty that an element exists is not needed for recognition, there must be sufficient evidence that this is so.

2.   When an element can exist in two or more allotropic forms each of which is stable over a range of conditions, it is said to exhibit enantiotropy.

3.   When an element exists in more than one crystalline form only one of which is stable it is said to exhibit monotropy.

4.   Baseball is one-run games, changing leads, excitable fans and classic confrontations, and those elements existed Sunday.

5.   Bad feng shui results when the elements exist in a destructive arrangement.

6.   It is a gamma-ray spectrometer, which will read gamma rays to determine what elements exist on the surface.

7.   Oakley admitted that an over-the-top element exists with pro athletes.

8.   That element still exists.

9.   The elements exist for an entertaining movie.

10.   Discovering how many elements actually exist has been a continual challenge to scientists, because it sheds light on how the universe evolved and the makeup of atoms.