In Science
The chemical element with the atomic number 61 (promethium), a lanthanide, is the element with the secondary lowest ordinal number, which does not possess any stable isotopes. The promethium preceding element with atomic number 60 (neodymium) and the promethium following element 62 (samarium) have all stable isotopes.
Read more about this topic: 61 (number)
Famous quotes containing the word science:
“If you have science and art,
You also have religion;
But if you don’t have them,
You better have religion.”
—Johann Wolfgang Von Goethe (1749–1832)
“It is an axiom in political science that unless a people are educated and enlightened it is idle to expect the continuance of civil liberty or the capacity for self-government.”
—Texas Declaration of Independence (March 2, 1836)