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Duplicate of Atomic Theory Flashcards | StudBud
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Duplicate of Atomic Theory
Duplicate of Atomic Theory
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atomic theory
Flashcards
17 cards
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Answers
1
The number of protons in the atom is the ____.
isotope number
mass number
atomic number
nuclear force
2
Which of the following isotopes represents an atom that has 17 protons and 20 neutrons?
37Ca
17Cl
37Cl
35Cl
3
What subatomic particle(s) are located in the nucleus?
electrons and neutrons
protons and neutrons
protons only
protons and electrons
4
Neutrons have a ________ charge and are found _________.
positive, in the nucleus
negative, in the electron shells
neutral, in the empty space around the nucleus
neutral, in the nucleus
5
Isotopes are atoms of the same element that have different numbers of ____.
neutrons
electrons
protons
electron shells
6
How many neutrons are in a zinc-65 atom?
40
30
65
35
7
The picture shown below represents which of the following concepts?
law of conservation of mass
Dalton's atomic theory
law of multiple proportions
Law of definite proportions
8
Atoms of the same element with different masses are called ____.
multiples
ions
anions
isotopes
9
Which of the following statements supports the law of definite proportions?
Water is always 89% oxygen and 11% hydrogen.
All atoms of the same element are identical.
The mass of the reactants is always the same as the products
All matter is composed of atoms.
10
All isotopes of an element have the same ____.
mass number
number of neutrons
atomic mass
number of protons
11
The mass number of an atom can be determined by ___.
subtracting neutrons and protons
adding protons and neutrons
adding protons and electrons
subtracting atomic number and protons
12
Which of the following was accomplished by Ernest Rutherford?
proposed the first atomic theory
developed the plum pudding model of the atom
performed experiments with cathode ray tubes
discovered that atoms contain large amounts of empty space
13
The force that holds the protons and neutrons together in the nucleus is the _____.
nuclide
atomic force
atomic mass
strong nuclear force
14
The first atomic theory was proposed by ________.
Thomson
Chadwick
Lavoisier
Dalton
15
James Chadwick made which of the following contributions to the atomic theory?
discovered that atoms are neutral
discovered electrons
discovered neutrons
discovered protons
16
Electrons were discovered by _______.
John Dalton
JJ Thomson
James Chadwick
Ernest Rutherford
17
Mass number can be calculated by ____.
subtracting atomic number and neutrons
adding protons and neutrons
adding protons and electrons
subtracting atomic number and protons
