History of the Atom Flashcards
who described the atom as a small indestructible sphere
Dalton
Dalton’s indestructible sphere model what known as the
Solid Sphere model
_________ first suggested the idea of _________ in the 4th Century
Democritus, Atoms
who first purposed the atom
Democritus
____________ discovered the electron using the ___________ ray tube.
JJ Thomson, cathode
The _________model was a ________ sphere with __________ particles embedded inside.
Plum pudding, positive, negative
_________ discovers a positive particle about ____ times the mass of the electron.
Eugen Goldstein, 1840
Who found a proton using CRT
Goldstein
The mathematical foundation for today’s model was the work of
Schrodinger
who is known for the Quantum model?
Schrodinger
who is known for the shell model?
Bohr
Who is known for the Planetary (gold foil) model?
Rutherford
who is known for the plum pudding model?
JJ Thompson
who discovered the electron?
JJ Thomson
who was known for the spherical model?
Dalton
___________ performs the gold foil experiment and concludes the atom is mainly _________ space with a small positive ________
Rutherford, empty, nucleus
Rutherford’s_________ model is modified by __________ to reflect electrons in fixed circular paths around the nucleus.
Nuclear, Bohr
The_______________ model is based on the probability of finding the ________ in 3 demential space.
Quantum Mechanical,electron
how does the Quantum Mechanical model differ from the Bohr model
Because it does not involve exact paths for the electron but rather the probability of finding the electron in a region of space.
what is the quantum mechanical model based on?
mathematical solutions from the work of Schrodinger
what does the plum pudding model reflect?
a positive sphere dotted with negative electrons
ion
an atom that has gained or lost electrons
isotope
atoms that have the same element with different numbers of neutrons
atom
the basic unit of a chemical element
