Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
The chemical element of atomic number 91, a radioactive metal of the actinide series, occurring in small amounts as a product of the natural decay of uranium.
- ‘All isotopes of protactinium are radioactive.’
- ‘Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.’
- ‘The dates of discovery of these elements as 1789 for uranium, 1829 for thorium, 1899 for actinium and 1913 for protactinium.’
- ‘A new method of radioactive tracing involves the use of a new clock, based on the radioactive decay of uranium - 235 to protactinium - 231.’
- ‘A protactinium - 234 atom has 91 protons and 143 neutrons.’
Early 20th century: from proto- ‘original, earlier’ + actinium, so named because one of its isotopes decays to form actinium.
We take a look at several popular, though confusing, punctuation marks.
From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.