Arsenic is neither a metal nor a non-metal but instead joins a select but rather ill defined group of elements called the metalloids. These are found in the periodic table along a diagonal line from ...

Arsenic is a trace element that lies just below phosphorus – which is essential for all living organisms – in the periodic table. This close chemical relationship means that cells are not always able ...

Arsenic is a trace element that lies just below phosphorus—which is essential for all living organisms—in the periodic table. This close chemical relationship means that cells are not always ...