- Rubidium (Wikipedia)
Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. Rubidium is the first alkali metal in the group to have a density higher than water. On Earth, natural rubidium comprises two isotopes: 72% is a stable isotope 85Rb, and 28% is slightly radioactive 87Rb, with a half-life of 48.8 billion years – more than three times as long as the estimated age of the universe.
- Comedy drama (Wikipedia)
Comedy drama, also known by the portmanteau dramedy, is a genre of dramatic works that combines elements of comedy and drama. In television, modern scripted comedy dramas tend to have more humour integrated into the story than the comic relief common in drama series but usually contain a lower joke rate than sitcoms.