Who discovered three chemical elements: cerium, thorium and selenium, and devised the modern method by which one or two letters are used to symbolise elements?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Jacob Berzelius.
- An avid and methodical experimenter, Jöns Jakob Berzelius (1779–1848) conducted pioneering experiments in electrochemistry and established the law of constant proportions.
- The experiment states that the elements in inorganic substances are bound together in definite proportions by weight.