Arsenic (pronounced /ˈɑrsnɪk/; also /ɑrˈsɛnɪk/ when attributive) is the chemical element that has the symbol As and atomic number 33. Arsenic was first documented by Albertus Magnus in 1250.

They were surviving on arsenic instead of phosphorous. Wolfe-Simon says other tests suggested that arsenic had even replaced some -- but not all -- phosphorous in the organism's DNA.

If ever there was an element that epitomizes the notion that chemicals might be good or bad depending on their use, arsenic must be it. Katherine Haxton explains why.

Adding to the bizarre finding is that an element usually associated with poison, arsenic, is capable of assuming quite the opposite character. It all makes the pursuit of bioscience even more of ...

In honor of scientist and astronomer Nicolaus Copernicus (1473-1543), the discovering team have suggested the name "copernicium" with the element symbol "Cp" for the new element 112.

Now, let's delve into solving the Element with the chemical symbol Sn crossword clue, featured as 53 Across in the USA Today Crossword on June 17, 2025.