Arsenic, bismuth, and antimony were identified by alchemists during the Middle Ages, and later during the 1700 ’ s, many more elements were found.
وعرف الخيميائيون في القرون الوسطى الزرنيخ والبِزموت والانتيمون ،‏ ثم اكتُشفت عناصر كثيرة اخرى في القرن الثامن عشر .‏