The philosopher who first introduced the formation of atomos.
Democritus
This is what Democritus called the smallest pieces of matter. It means uncuttable.
Atomos
Who believed that matter was continuous and made of four basic elements and did not believe Democritus' judgements?
Aristotle
Who revived Democritus's ancient idea? He believed that atoms were solid, indivisible spheres.
John Dalton
It is the representation of Democritus' idea of an atom.
Indivisible Particle Model
It is the representation of John Dalton's description of an atom.
Solid Sphere model
Who is the father of Modern Atomic Theory?
John Dalton
It is a law that says that a compound always contains the same elements in the same ratio by mass.
Law of Definite Proportions
Who was the one that made the Law of Definite Propotions?
Joseph Proust
It is a law that says when two elements form more than one compound, the masses of one element that combine with a fixed mass of the other are in ratios of small whole numbers.
Law of Multiple Proportions
Who introduced the Law of Multiple Proportions?
John Dalton
What law supported Dalton's theory that atoms are rearranged but not changed?
Law of Conservation of Mass
Who introduced the Law of Conservation of Mass?
Antoine Lavoisier
He discovered the electron and showed that atoms are made of smaller particles. He proposed the "Plum Pudding Model" of the atom.
J.J. Thomson
What experiment did J.J. Thomson created to discover the electron?
Cathode Ray Tube Experiment
It is the model of J.J. Thomson that is shape like a cookie.
Plum Pudding Model
He discovered the nucleus of the atom and that atoms are mostly empty space using his Gold Foil Experiment.
Ernest Rutherford
What is the experiment created by Ernest Rutherford that led him to discover the nucleus?
Gold Foil Experiment
He discovered the neutron, a neutral particle found in the nucleus along with protons using his experiment Beryllium Radiation Experiment.
James Chadwick
What is the experiment James Chadwick created to discover neutrons?
Beryllium Radiation Experiment
He discovered the exact charge of a single electron using his Oil Drop Experiment.
Robert Andrews Millikan
What was the experiment Millikan created to discover the exact charge of an electron?
Oil Drop Experiment
Who discovered the electron?
J.J. Thomson
Who discovered the nucleus?
Ernest Rutherford
Who discovered the neutron?
James Chadwick
Who discovered the exact charge of a single electron?
Robert Andrews Millikan
Identify their Experiments
J.J. Thomson: Cathode Ray Tube Experiment
Ernest Rutherford: Gold Foil Experiment
James Chadwick: Beryllium Radiation Experiment
Robert Andrews Millikan: Oil Drop Experiment
What atomic model did Ernest Rutherford created?
Nuclear Model of Atom
What atomic model did Erwin Schrodinger created?
Quantum Mechanical Model
What atomic model did Niels Bohr created?
Planetary Model
Identify their Atomic Model
Democritus of Abdera: Indivisible Particle Model
John Dalton: Solid Sphere Model
J.J. Thomson: Plum Pudding Model
Ernest Rutherford: Nuclear Model
Niels Bohr: Planetary Model
Erwin Schrodinger: Quantum Mechanical Model
Who is the scientist who discovered the law of definite proportions?
Proust
Who introduced the idea that matter is made up of tiny, indivisible particles called atoms?
Democritus
Whose work showed for the first time that atoms emit negatively charged particles?
J.J. Thomson
What model shows an atom as a ball of positive charge with electrons embedded in it, much like chocolate spread through cookie dough?
Plum Pudding Model
Who is the scientist whose experiment led to the idea that the center of the atom is a dense positive charge?
Ernest Rutherford
What does the atom consist of?
Electrons, Protons, and Neutrons
How many protons are there in any given neutral atom relative to the number of electrons?
equal to the amount of electrons
What subatomic particle(s) are found in the nucleus and account for most of the mass of the atom?