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WorksheetsAtomic History
Total questions: 21
Worksheet time: 13mins
What were John Dalton three contributions to atomic history?
Created the atomic theory
Discovered that the atom is mostly empty space
Believed that atoms of a given element are identical
Hypothesized that the atom is a tiny, hard sphere
Believed that the universe was made of tiny "uncuttable" particles
Who was the first contributor to the atomic theory?
John Dalton
Ernest Rutherford
JJ Thompson
Democritus
Neils Bohr
What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?
Neils Bohr, Ernest Rutherford, JJ Thomson, John Dalton, & Democritus
JJ Thomson, John Dalton, Neils Bohr, Ernest Rutherford, & Democritus
Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr
John Dalton, Neils Bohr, JJ Thomson, Democritus, & Ernest Rutherford
What were J. J. Thomson's three contributions to the atomic theory?
Discovered the electron
Discovered the nucleus -did the gold foil experiment
Used the cathode ray tube in his discovery
Created a model of the atom with electrons moving around the nucleus in fixed orbits
Created the "plum pudding" model of the atom
What are two facts about Democritus's?
Greek philosopher
Created the atomic theory
Used the cathode ray tube in his discovery
Believed that the universe was made of tiny "uncuttable" particles
Discovered that the atom is mostly empty space
What is Neils Bohr's contribution to the atomic theory?
Created the atomic theory
Created a model of the atom with electrons moving around the nucleus in a fixed orbits
Discovered that the proton had a positive charge
Believed that atoms of a given element are identical
Discovered the electron
What were Ernest Rutherford's three contributions to atomic theory?
Discovered that the atom is mostly empty space
Discovered the nucleus- did the gold foil experiment
Used the cathode ray tube in his discovery
Discovered the electron
Discovered that the proton had a positive charge
Mass is neither created nor destroyed during chemical reactions or physical changes.
Law of multiple proportions
law of definite proportions
law of scientific theory
law of conservation of mass
states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
law of definite proportions
law of conservation of mass
law of multiple proportions
periodic table
