Ns, Ps, Es
John Dalton
Who is the Father of the Atomic Theory?
Who developed the Law of Partial Pressures of Gases
Used Brownian motion to substantiate the existence of atom.
Who was Einstein?
cathode-ray tube
What did J.J. Thomson use for his electron experiment?
Water
What did Thales believe was the origins of all matter? What is a compound that Dalton used to explain the ratios of atoms in a compound?
Ions
What are charged atoms, resulting from the gain or loss of electrons?
Democritus
Who is known for "atomos"--indivisible?
Uncertainty Principle - cannot know the energy AND location of an electron at the same time
What principle was developed by Heisenberg and then used by Schrodinger?
Developed model of the Hydrogen atom
Who is Bohr?
John Dalton's Atomic Theory
What states: 1. All matter is composed of atoms; 2. All atoms of the same element are identical in size, mass, and properties; 3. Atoms cannot be subdivided, created, or destroyed; 4. Atoms of different elements combine in whole number ratios; 5. In chemical reactions, atoms are rearranged, separated, or combined?
Isotopes
What are atoms of the same element with different masses, due to different numbers of neutrons?
Thales
Who proposed water as the basic structure of matter?
Who was Einstein?
gold foil
What experiment did Rutherford and his colleagues perform to discover the nucleus?
indivisible
What does the Greek word "atomos" mean?
J. J. Thomson
Who discovered the electron?
Worked with Rutherford at the University of Manchester and discovered the neutron.
Who was James Chadwick?
Neils Bohr
Whose experiments led to the suggestion that electrons travel around the nucleus in paths?
Aristotle
Who is known for 4 elements - earth, air, fire, and water?
1/12 the mass of a carbon-12 atom
What is an atomic mass unit?
Ernest Rutherford
Who discovered the nucleus?
Discovered radium and polonium. Increased understanding of radioactivity.
Who was Marie Curie?
Quantum Mechanical Model of the Atom
What is Schrodinger's model of the atom?
Packet of light
What is a photon?