Ch 5 Atomic

Ch 5 Atomic

Democritus
made a mental model of the atom; Greek philosopher
Dalton
formed the atomic theory model of the atom; English schoolteacher
Thomas
“plum pudding” model of the atom; discovered the electron
Chadwick
Discovered the neutron
Rutherford
Discovered the necleues using his gold foil experiament
Proton
the positive particle in the nucleus of an atom.
Atom
the smallest particle of an element that has the properties of that element
Bohr
Developed the model of the atom in which electrons orbit the nucleus in energy levels
Wave Model
current model of the atom; proposed by Schrodinger
Neutron
the neutral particle in the nucleus of an atom
Alpha particle
Used by Rutherford in his experiment, made of two protons and two neutrons
Electron
the negative particle that circles the neucleus
Model
Used by scientists to explain something we can not see of understand
Energy Levels
the paths in which electrons circle the nucleus according to the Bohr model
Nucleus
the tiny postive core of an atom; contains protons and neutrons
Electron Cloud
current explanation of where electrons might be found in an atom
Isotope
same element, different # of neutrons
Ions
atom that has gained or lost and electron, has a charge