Honors Chemistry Scientists Exam
Questions and Answers 100% Pass
Democritus - ✔✔Matter is made of "indivisible parts" he called atomos "meaning
cannot be cut"
Democritus - ✔✔Because of his ideas, we still call these particles atoms
Dalton - ✔✔Proposed that atoms are small indivisible spheres
Dalton's Atomic Model - ✔✔Billard Ball model and was hard sphere
(model)
J.J Thompson - ✔✔He did experiments with cathode ray tubes.
J.J Thompson - ✔✔He found that all atoms contain a little particle called electron.
Thompson's Atomic Model - ✔✔-called "Plum Pudding" or "Raisin Bun"
-was called positive dough with negative electrons like raisins scattered throughout
(model)
Rutherford - ✔✔He did the gold foil experiment.
Katelyn Whitman, All Rights Reserved © 2025 1
, Rutherford - ✔✔He did experiments with radioactive Polonium which emitted positive
particles called alpha particles.
Rutherford - ✔✔In an experiment, he shot the positive alpha particles through a piece of
gold foil and then onto a screen.
Rutherford - ✔✔said atoms was mostly empty space with a dense positive center he
called the nucleus
Rutherford - ✔✔he called the positive particles in the nucleus protons
Rutherford's Atomic Model - ✔✔-"Planetary Model"
-has a very small compact nucleus made of positively charged protons with electrons
around the outside in circular orbits in a lot of empty space
(model)
Bohr's Atomic Model - ✔✔a positive charged, very dense nucleus with electrons around
the nucleus in a lot of empty space and located in orbitals in specific energy levels
(model)
Chadwick - ✔✔discovered the neutron
Cloud Atomic Model - ✔✔-based on Born and Heisenberg's work
Katelyn Whitman, All Rights Reserved © 2025 2
Questions and Answers 100% Pass
Democritus - ✔✔Matter is made of "indivisible parts" he called atomos "meaning
cannot be cut"
Democritus - ✔✔Because of his ideas, we still call these particles atoms
Dalton - ✔✔Proposed that atoms are small indivisible spheres
Dalton's Atomic Model - ✔✔Billard Ball model and was hard sphere
(model)
J.J Thompson - ✔✔He did experiments with cathode ray tubes.
J.J Thompson - ✔✔He found that all atoms contain a little particle called electron.
Thompson's Atomic Model - ✔✔-called "Plum Pudding" or "Raisin Bun"
-was called positive dough with negative electrons like raisins scattered throughout
(model)
Rutherford - ✔✔He did the gold foil experiment.
Katelyn Whitman, All Rights Reserved © 2025 1
, Rutherford - ✔✔He did experiments with radioactive Polonium which emitted positive
particles called alpha particles.
Rutherford - ✔✔In an experiment, he shot the positive alpha particles through a piece of
gold foil and then onto a screen.
Rutherford - ✔✔said atoms was mostly empty space with a dense positive center he
called the nucleus
Rutherford - ✔✔he called the positive particles in the nucleus protons
Rutherford's Atomic Model - ✔✔-"Planetary Model"
-has a very small compact nucleus made of positively charged protons with electrons
around the outside in circular orbits in a lot of empty space
(model)
Bohr's Atomic Model - ✔✔a positive charged, very dense nucleus with electrons around
the nucleus in a lot of empty space and located in orbitals in specific energy levels
(model)
Chadwick - ✔✔discovered the neutron
Cloud Atomic Model - ✔✔-based on Born and Heisenberg's work
Katelyn Whitman, All Rights Reserved © 2025 2
