Forensic toxicology plays a crucial role in criminal investigations. These skilled professionals examine bodily fluids and tissues to detect the presence of harmful substances. Their expertise may help determine the cause of death, shed light potential foul play, and ultimately assist law enforce

Before modern classification systems, scientists faced challenges in the known elements. One early attempt was made by Johann Wolfgang Döbereiner, a German chemist who observed a striking pattern among certain groups of compounds. He proposed that three elements with similar properties could be g