Avogadro.
Also, he made a Hypothesis.
this answer will not be found on this page
carbon
there is no record of who discovered mercury, the element. But it is found that it was used by the ancient Chinese and has been found in the Egyptian tombs from around 1500 BC.
2
By weight or by number of atoms? By number of atoms
It was discovered in 1879 in France.
2 Carbon atoms, 4 Hydrogen atoms, 2 Oxygen atoms
Yes, EVERY element has electrons in their atoms.
it was the noted chemistry scientist scholar, DR. DALTON
No, it is not. It is a chemical element which was discovered only in 1898.
Phosphorus in 1669 Prepared from urine, it was the first element to be chemically discovered.
Giulio Natta discovered metals reaction with air.