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2.01 Atomic theory Flashcards | StudBud
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2.01 Atomic theory
2.01 Atomic theory
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Development of atomic theory. Modern atom and subatomic particles.
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Questions
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Answers
1
Who first came up with the idea of atoms ("atomos" meaning "uncuttable")?
Bohr
Dalton
Democritus
Chadwick
2
Whose experiment is this and what was discovered?
Rutherford, nucleus
Dalton, electrons
Thomson, protons
Thomson, electrons
3
What did the gold foil experiment detect?
nucleus
electrons
protons
neutrons
4
Who conducted the gold foil experiment?
Dalton
Thomson
Bohr
Rutherford
5
Who came up with the electron cloud model (probability of an electron being in a certain location)?
Schrodinger
Democritus
Dalton
Thomson
6
Where is nearly all the mass of an atom located?
in the electron cloud
in the protons
in the nucleus
in the neutrons
7
Thomson's experiment detected
electrons
protons
nucleus
neutrons
8
Who came up with the concept that electrons are discreet distances from the nucleus?
Thomson
Bohr
Dalton
Schrodinger
9
An atom is mostly
electrons
protons and neutrons
empty space
nucleus
10
What subatomic particle has a positive charge and where is it located?
electron, nucleus
electron, electron cloud
neutron, nucleus
proton, nucleus
11
What subatomic particle has a neutral (no) charge and where is it located?
neutron, electron cloud
proton, nucleus
electron, electron cloud
neutron, nucleus
12
What unexpected result occurred in the gold foil experiment and what did it mean?
All alpha particles passed thru gold foil cuz' atoms are mostly empty space
A few alpha particles bounced off cuz' + particles are spread through atom
Only a few alpha particles went through cuz' atom is electrons.
A few alpha particles deflected cuz' there's dense + charge in middle
13
Whose model of the atom is this and what is it called?
Thomson's plum pudding model
Democritus' atomic properties model
Dalton's solid ball model
Rutherford's plum pudding model
14
Which part of Dalton's atomic theory was later proven incorrect?
Atoms cannot be subdivided
Atoms can't be created or destroyed in chemical reactions.
All atoms of a given element are identical.
Atoms combine in compounds that always have the same ratios of atoms.
15
He thought an atom was a solid ball.
Dalton
Democritus
Chadwick
Bohr
16
An atom that gains or loses electrons has a negative or positive charge and is called a(n)
orbital atom
nucleus
ion
isotope
17
What subatomic particle has a negative charge and where is it located?
neutron, electron cloud
electron, electron cloud
proton, nucleus
neutron, nucleus
18
Who came up with the first testable theory about the structure and properties of the atom?
Dalton
Democritus
Chadwick
Thomson
19
What did Chadwick discover?
electron
proton
neutron
nucleus
20
An atom that that has the same number of protons and electrons but different numbers of neutrons is called
ion
neutron atom
electron cloud
isotope
