Atom Guys Flashcards
Showed that an atom is mainly empty space. Was able to identify protons and neutrons of the nucleus. These parts of the atom make up most of the mass. Found out that the mass of a neutron is relatively the same as a proton.
Rutherford
Studied the hydrogen atom and concluded that electrons moved like the planets revolving around the sun. He disapproved RUTHERFORD’s idea that the electrons could be any distance around the nucleus. He experimented with the hydrogen atom as it was excited and admitted it light. He link the connection between light and the structure of the atom.
Bohr
First person who use the word atom. Stated that the atom was indivisible. Thought that atoms were small spheres with no holes and empty space. Greek philosopher.
Democritus
Came up with the theory of the law of conservation of mass. Put solid mercury oxide in a close container and heated it. Sorry red powder change into the silvery liquid gas.
Lavoisier
Came up with the theory of the law of definite proportions. Stating that the compounds always contain the same elements and same amount. No matter where the element or compound comes from, it will always contain the same amount of atoms. Example H2O will always have two parts hydrogen and one part oxygen.
Proust
Created the atomic theory. The atomic theory states that all Adams of the same element are at Sakely the same while the atomic weight of different elements differ. Came up with the billiard ball model.
Dalton
Order of atomic theories
Democritus Lavoisier Proust Dalton Thompson Rutherford Bohr
Planetary model
Rutherford
Idea that electrons were at a fixed radius from the nucleus
Bohr
Plum pudding theory
Thompson
Parts of an atom
Proton neutron electron
Concluded that an atom is mostly empty space.
Rutherford
Studied the hydrogen Atom. Came up with the theory of spectral lines and energy levels.electrons orbit the nucleus at a set distances
Bohr
Picture of the atom was a simple neutral sphere of indivisible matter that was the same throughout. Atoms of different elements however were different from one another.
Dalton
Discovery of the electron showed that atoms were not indivisible. They contained negative electrons and positive charges to make the neutral.
Thompson
