hydrogen, oxygen, nitrogen, carbon, sulfur, iron, calcium, iodine, selenium, chlorine, potassium, phosphorous, etc.
See the link bellow.
Carbon, hydrogen, and oxygen.
nitrogen and oxygen
There are many elements that are contained in seawater. Some examples include magnesium, sulfur, selenium, silicon, fluorine, sodium, and chlorine.
Formaldahyde
the answer is complement
Hydrogen and Oxygen
The book Elements contained axiomic proofs for plane geometry.
its false no cap
Hydrogen and carbon.
bodies of neruons
dumbledore
Mendeleev's first periodic table contained 63 elements. He left gaps for undiscovered elements and predicted their properties based on the patterns of the known elements around them. Mendeleev's table was later expanded to include more elements as they were discovered.