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Law of Conservation of Mass
was discovered by Antoine Lavoisier, the law said that in a chemical reaction matter is not created or destroyed -
Antoine Lavoisier
Discovered The law Conservation of Mass. Matter is neither destroyed nor created, only able to change form -
Joseph Louis Proust
Law of Constant Proportion stating the product produce has the same proportion to mass as it was in the beginning -
Dalton's Atomic Theory
The theory was composed of that matter made up of matter, atoms can never be destroyed, atoms that are the same element are the same, different elements have different atoms, reaction occurs when the atoms are moved around. -
John Dalton
Elements can be distinguished by their weight
Experimented with the mixture of gases
Atoms can go from big to small and be broken to smaller pieces -
law of definite proportions
This law was stated by Joseph Louis Proust after looking at his results from experiments that he had done between 1798 to 1804 -
Eugen Goldstein
discovered the anode ray that had positive ions which later led to the discovery of protons by Ernest Rutherford. -
Dmitri Mendeleev
Created the periodic table in 1869 (with gaps) -
Marie Curie
Showed that atoms were divisible
Discovered Polonium and radium -
J.J. Thompson
he discovered the electrons while doing the experiments of the cathode rays tubes -
Cathode RayTube
most of the experiment was done by J.J Thompson which was a vacuum tube that blasted electrons which was later used to create images on television. -
Plum Pudding Atomic Model
was a model of the atom which was created by J.J Thompson. This was later proven wrong by other experiments -
Gold Foil Experimnt
is the experiment conducted to find more information of how the structure of the atom is. The experiment was guided by Ernest Rutherford. -
Robert Millikan
was working on a oil-drop experiment so they can measure a single charge in a single electron. So he could find out the actual charge and mass. -
Rutherford Model
is the model of an atom based on the gold-foli experiment. The model was created by Ernest Rutherford. -
Ernest Rutherford
Atoms were mostly empty space in the middle
Theory of the neutron of an atom
Discovered the proton -
J.J. Thompson
he confirmed that isotopes exist by observing diffrent mass to make it stable so they are not radioactive. -
Bohr Planetory Model
is a model of an atom which has positively charged nucleus surrounded by electrons. Was made/developed by Neil’s Bohr -
Quantam Mechanical Model
developed by Neil Bohr. Is the description of how matter interacts with energy. -
Niels Bohr
The Bohr model in which electrons travel by orbit around the nucleus
The shell model where chemical properties determine the property of the element
Developed the quantam mechanical model -
Erwin Schrodinger
developed an equation that describes quantum state of a physical state that changes with time. -
Werner Heisenberg
created the uncertainty principle
which restrict the accuracy of the distance -
James Chadwick
he discovered the neutron of an atom. -
Lise Meitner
she made and prove the theory that a nucleus of an atom can be split into two smaller parts which is called nuclear fission. She was also able relate this to the equation E = mc2
