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STJPII Introduction to Atoms Flashcards | StudBud
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STJPII Introduction to Atoms
STJPII Introduction to Atoms
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Describes the development of atomic models and the structure of atoms.
Flashcards
27 cards
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Practice quiz
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Questions
27
Answers
1
All elements are composed of atoms.
true
false
2
The particle of an atom that is neutral.
isotope
electron
neutron
proton
3
Which two particles of an atom have about the same mass?
neutron & electron
electron & isotopes
none of the above
proton & neutrons
4
Atoms have no overall electrical charge.
false
true
5
The number of protons in the nucleus of every atom of an element.
atomic mass
atomic number
6
The atomic model of _____ resembled planets orbiting the sun.
Rutherford
Dalton
Bohr
Thomson
7
Atoms are the smallest particles of matter.
false
true
8
Who Made this atomic model?
Einstien
Bohr
Dalton
Mrs. Hurd
9
Who described the atoms as negative charges scattered through a ball of positive charges?
Bohr
Thomson
Mendeleev
Rutherford
10
Atoms of the same element that differ in number of neutrons & have the same number of protons.
neutrons
isotopes
electrons
protons
11
Most of the mass of an atom is due to its protons and neutrons.
false
true
12
_____ are atoms with the same # of protons but with a different # neutrons.
none of the above
atomic number
isotope
atomic mass
13
With only a few changes, Dalton's atomic theory is still accepted today?
true
false
14
What particles are in the center of an atom?
protons & neutrons
neutrons & electrons
electrons & protons
protons & electrons
15
What part of an atom identifies an element?
Chemical name
atomic number
Chemical symbol
number of nuetrons
16
The very small center core of an atom.
nucleus
proton
neutron
electron
17
What particle did Chadwick discover that was hard to detect because it had no electric charge?
neutrons
nucleus
protons
electrons
18
Who Made this atomic Model?
Bohr
Isaac Newton
Dalton
Rutherford
19
Who made this Model?
Misour Lopez
Thomson
Tomson
Einstein
20
What experiment convinced Ernest Rutherford that the atom has small, +charged nucleus?
carbon-foil experiment
none of the above
gold-foil experiment
silver-foil experiment
21
The sum of protons and neutrons in the nucleus of an atom.
mass number
atomic number
isotopes
energy level
22
A specific amount of energy related to the movement of electrons in atoms.
atomic number
mass number
energy level
isotopes
23
An element can be identified by the number of protons in the nucleus of its atoms.
false
true
24
Who made this atomic model?
Dalton
Thompson
Bohr
Mendeleev
25
The term Rutherford gave to the +charged particles in the nucleus of an atom was _____.
neutrons
atom
electrons
protons
26
The particle of an atom with a positive charge.
electron
nucleus
proton
neutron
27
The particle of an atom that moves rapidly in the space outside the nucleus.
isotope
electron
neutron
proton
