Contributions Flashcards
Who determined that the mass of a Proton approximately equals the mass of a neutron?
James Chadwick
Who discovered the Electron?
J.J Thomson
Who discovered the Neutron
James Chadwick
Who discovered the Proton?
Ernest Rutherford
Who developed the theory that atoms are mostly empty space?
Ernest Rutherford
Who conducted the gold-foil experiment to establish the existence of the Nucleus?
Ernest Rutherford
Who hypothesized that all matter is made of indivisible atoms?
John Dalton
Who organized the elements of the Periodic Table according to their properties and atomic numbers?
Dimitri Mendeleev
Who predicted the properties of elements unknown at the time?
Dimitri Mendeleev
Who hypothesized that all atoms of an element are identical?
John Dalton
Who had the idea that an atom is a positively charged sphere, with Electrons evenly distributed, like raisins in a plum pudding?
J.J Thomson
Who hypothesized that atoms of different elements are different?
John Dalton
Who demonstrated that electrons move around the Nucleus in a fixed orbit?
Niels Bohr
Who demonstrated that the Nucleus of an atom is surrounded by a cloud of Electrons?
Ernest Rutherford
Who demonstrated that the Nucleus contains most of an atom’s mass and is positively charged?
Ernest Rutherford
