Boyle demonstrated the necessity of air for combustion, for animal breathing, and for the transmission of sound.He published much influential work,including New Experiments Physio-Mechanical,Touching the Spring of the Air and its Effects and the Sceptical Chymist. In the Spring of The Air he described the inverse relationship between the volume of a gas and its pressure now known as Boyle's Law.

Discovered oxygen. He was educated to be a minister in the churches that dissented from the church of England.

He first published his Law of Definate in 1794. This law states a compound is composed of exact proportions of elements mass regardless of how the compound was created.

Dalton contributed to the atomic theory,that matter is composed of the atoms of differing weights combined in simple ratio's by weight.Dalton was the first to prepare a table of relative atomic weights.

Before Priestly Scheele discovered oxygen first and called it,"fire air" because it supported combustion.

Found that the mass is conserved in a chemical reaction.The total mass of the products of a chemical reaction is always the same as the total mass of the starting material consumed in the reaction.

Plucker demonstrated that analyticd geometry was capable of replacing the results of pure geometry. He replaced the point by the straight line as a fundamental element in geometry.

His first great discovery was that of the element thallium. He found that as the attenuation of the gas was made greater the dark spare round the negative electrode, while rays, now known as cathode rays,proceed from the electrode.

Modified Crookes tubes and found that lays inside the tube had a negative charge.

Discovered radioactive elements and created the theory of radioactivity.

Worked wit Rutherford and proved that the reason for odd behavior of radioactive elements was because they decayed into other elements and created alpha, beta, and gama radiation

Jean Perrin confirmed Einstein's ideas on Brownian motion by the empirically calculating Avogadro's Constant, conclusively proving Dalton's atomic theory.

Won a nobel prize in 1908 after discovering his nucleus.

Bombarded gold atoms with alpha particles in a experiment which led to Rutherford discovery.

Performed oil-drop experiment and was able to determine the change and mass of a single electron.

Co-inventor of the Geiger counter.

Discovered the neutron accounting for most of the mass in an atom.