#1
Who discovered the electron?
J.J. Thomson
ExplanationJ.J. Thomson discovered the electron.
#2
Which subatomic particle has a positive charge?
Proton
ExplanationProtons have a positive charge.
#3
What is the charge of a neutron?
Neutral
ExplanationNeutrons have no charge; they are neutral.
#4
Which scientist proposed the concept of atomic theory?
John Dalton
ExplanationJohn Dalton proposed the concept of atomic theory.
#5
What is the atomic number of carbon?
6
ExplanationThe atomic number of carbon is 6.
#6
Who proposed the planetary model of the atom?
Niels Bohr
ExplanationNiels Bohr proposed the planetary model of the atom.
#7
Which of the following scientists conducted the gold foil experiment?
Ernest Rutherford
ExplanationErnest Rutherford conducted the gold foil experiment.
#8
Who proposed the idea of quantized energy levels in atoms?
Niels Bohr
ExplanationNiels Bohr proposed the idea of quantized energy levels in atoms.
#9
Who discovered the nucleus of an atom?
Ernest Rutherford
ExplanationErnest Rutherford discovered the nucleus of an atom.
#10
Who first proposed the existence of the atom?
Democritus
ExplanationDemocritus first proposed the existence of the atom.
#11
What is the maximum number of electrons that can occupy the third energy level of an atom?
18
ExplanationThe maximum number of electrons that can occupy the third energy level of an atom is 18.
#12
Who proposed the wave-particle duality of electrons?
Louis de Broglie
ExplanationLouis de Broglie proposed the wave-particle duality of electrons.
#13
Who formulated the equation for the quantization of angular momentum in an atom?
Niels Bohr
ExplanationNiels Bohr formulated the equation for the quantization of angular momentum in an atom.
#14
Who discovered the concept of electron configuration?
Gilbert N. Lewis
ExplanationGilbert N. Lewis discovered the concept of electron configuration.