Question: Who discovered the first five elements in the periodic table and what were the respective years of their discoveries?

Decomposition:
question: Who discovered Hydrogen and in which year?
answer: Henry Cavendish, 1766
question: Who discovered Helium and in which year?
answer: Pierre Janssen, 1868
question: Who discovered Lithium and in which year?
answer: Johan August Arfwedson, 1817
question: Who discovered Beryllium and in which year?
answer: Louis Nicolas Vauquelin, 1798
question: Who discovered Boron and in which year?
answer: Joseph Louis Gay-Lussac, 1808

Answer:
Hydrogen: Henry Cavendish, 1766
Helium: Pierre Janssen, 1868
Lithium: Johan August Arfwedson, 1817
Beryllium: Louis Nicolas Vauquelin, 1798
Boron: Joseph Louis Gay-Lussac, 1808

Categories: Chemistry
History