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Atomic Theory Quiz


What is an isotope An atom where the number of protons do not equal the number of neutrons
What is matter made of Atoms
What are characteristics of atoms They are indestructible and indivisible
How are compounds formed By a combination of two or more different kinds of atoms
What is a chemical reaction A rearrangement of atoms
Atomic theory All matter is made up of distinct, indivisible particles
Mendelev wrote first PT on a deck of playing cards
Greek thinker, came up with "atomos" Democrates
Democrates "if you separate something until it can't be divided anymore, the atomos will be indivisible, invisible, and homogeneous"
said that atoms don't exist; matter is made of earth, fire, air, and water. (Theory wasn't disputed for a long time) Aristotle
John Dalton Father of Modern Atomic Theory
Says that atoms do exist, atoms are round empty balls that hook together John Dalton
Sir William Cookes Discovered the electron by accident, in the absence of matter there are charged particles, cathode ray tube
called electrons corpuscles, used the cathode ray tube, said that there were particles smaller than atoms JJ Thompson
JJ Thompson plum pudding model
Robert Milliken oil drop experiment, measured the mass of an electron
looked at other charges in the atom, Gold Foil Experiment Ernest Rutherford
Ernest Rutherford refuted plum pudding model, discovered the positive charge and the nucleus
James Chadwick discovered the neutron, number of electrons= the number of protons
came up with energy levels Neils Bohr
Created by: Jaspergem