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The Development of the Atomic Theory Flashcards | StudBud
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The Development of the Atomic Theory
The Development of the Atomic Theory
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History of the Atom, & Atomic Structure
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
Discovered that electrons DO NOT travel on definite paths
Modern Atomic Theory (Shrodinger & Heisenberg)
Thomson
Democritus
Bohr
2
Atoms are considered to be neutral (no charge) because:
They have equal numbers of protons and electrons
The negative electrons are too small to affect the atom
They have neutrons inside the nucleus
They have equal numbers of protons and neutrons
3
The mass number of 1 electron is approximately
5 amu
10 amu
0 amu
1 amu
4
He discovered the nucleus
Dalton
Democritus
Rutherford
Bohr
5
He conducted the Cathode Ray Tube experiment
Dalton
Bohr
Thomson
Rutherford
6
Stated that electrons travel on definite paths
Dalton
Democritus
Bohr
Rutherford
7
Two atoms that are identical except for __________ are called isotopes.
the nucleus
the number of neutrons
the number of electrons
the atomic number
8
This subatomic particle is negatively charged
nucleus
neutron
electron
proton
9
This subatomic particle is postively charged
neutron
nucleus
proton
electron
10
Found at the center of the atom
electrons only
neutrons only
protons only
the nucleus
11
This identifies the element
Mass number
Atomic number
Atomic Mass
Mass
12
Which scientist used the Gold Foil Experiment?
Schrodinger & Heisenberg
Dalton
Democritus
Rutherford
13
He named the atom from the Greek word "atomos" that means uncuttable
Rutherford
Democritus
Bohr
Dalton
14
The first scientist to prove that smaller particles inside the atom existed
Aristotle
Thomson
Schrodinger & Heisenberg
Rutherford
15
His discoveries were so important that he had an entire theory named after him
Rutherford
Bohr
Democritus
Dalton
