Flashcards
Atomic theory
Positively charged particle of an atom is:
neutron
electron
proton
Center of an atom is called:
nucleus
Particle with no electrical charge of an atom is:
proton
neutron
electron
Negatively charged particle of an atom is:
electron
neutron
proton
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Cation
an ion with a positive charge
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Anion
an ion with a negative charge
The nuclear model of the atom held that:
electrons were randomly spread through "a sphere of uniform positive electrification."
matter was made of tiny electrically charged particles that were smaller than the atom.
matter was made of tiny, indivisible particles.
the atom had a dense, positively charged nucleus.
the atom had a dense, positively charged nucleus.
What is the name of the researcher who isolated the neutron in 1932?
Ernest Rutherford
Niels Bohr
James Chadwick
Robert Millikan
Which scientist isolated the proton from the nucleus in 1919?
J.J. Thomson
James Chadwick
Niels Bohr
Ernest Rutherford
Which of the following is the philosopher credited with coining the term "atom"?
Plato
Democritus
Aristotle
Socrates
A particle smaller than an atom:
subatomic particle
What is the value of the charge on an electron?
Positive1.60 x 10^-19 coulombs
Negative 1.60 x 10^-19 volt
Negative 1.60 x 10-^19 coulombs
Positive 1.60 x 10^-19 volt
Negative 1.60 x 10-^19 coulombs
Which scientist discovered the electron?
William Crookes
Michael Faraday
J.J. Thomson
Ernest Rutherford
J.J. Thomson proved that cathode rays were beams of .....
Different forms of the same element, containing the same number of protons but different number of neutrons are:
isotopes
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Aufbau Principle
states that each electron occupies the lowest energy orbital available
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Pauli's exclusion Principle
principle that states electrons occupying the same orbital must have opposite spin
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Hund's Rule
states that every orbital in a subshell has one electron before a single orbital is double occupied with two.
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