Flashcards
Atomic theory
Flashcards for quick repetition. This quiz covers the atomic theory as well as history of atomic theory development.
Flashcards: 15
Played: 1627 times
Positively charged particle of an atom is:
Center of an atom is called:
nucleus
Particle with no electrical charge of an atom is:
Negatively charged particle of an atom is:
Match term with definition
Cation
an ion with a positive charge
Anion
an ion with a negative charge
The nuclear model of the atom held that:
matter was made of tiny electrically charged particles that were smaller than the atom.
the atom had a dense, positively charged nucleus.
matter was made of tiny, indivisible particles.
electrons were randomly spread through "a sphere of uniform positive electrification."
the atom had a dense, positively charged nucleus.
What is the name of the researcher who isolated the neutron in 1932?
Niels Bohr
Ernest Rutherford
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"?
Democritus
Socrates
Aristotle
Plato
A particle smaller than an atom:
subatomic particle
What is the value of the charge on an electron?
Positive 1.60 x 10^-19 volt
Positive1.60 x 10^-19 coulombs
Negative 1.60 x 10^-19 volt
Negative 1.60 x 10-^19 coulombs
Negative 1.60 x 10-^19 coulombs
Which scientist discovered the electron?
J.J. Thomson
William Crookes
Ernest Rutherford
Michael Faraday
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
Match definitions:
Aufbau Principle
states that each electron occupies the lowest energy orbital available
Pauli's exclusion Principle
principle that states electrons occupying the same orbital must have opposite spin
Hund's Rule
states that every orbital in a subshell has one electron before a single orbital is double occupied with two.
