#1
Who proposed the planetary model of the atom?
Ernest Rutherford
Niels Bohr
John Dalton
J.J. Thomson
#2
What is the charge of a proton?
Positive
Negative
Neutral
Variable
#3
Who developed the concept of electron configuration?
Erwin Schrödinger
Werner Heisenberg
Max Planck
Linus Pauling
#4
What is the term for the distance between adjacent peaks of a wave?
Frequency
Wavelength
Amplitude
Period
#5
What is the charge of an electron?
Positive
Negative
Neutral
Variable
#6
Who proposed the wave-particle duality of electrons?
Erwin Schrödinger
Albert Einstein
Louis de Broglie
Max Planck
#7
Who discovered the neutron?
James Chadwick
Ernest Rutherford
Marie Curie
Albert Einstein
#8
What does the principal quantum number indicate?
Energy level
Spin of the electron
Orbital shape
Angular momentum
#9
What is the Aufbau Principle?
Electrons fill orbitals starting from the lowest energy levels.
Electrons in the same orbital must have opposite spins.
Electrons will occupy empty orbitals before pairing up.
The energy of an electron in an atom is quantized.
#10
What does Hund's Rule state?
Electrons in the same orbital must have opposite spins.
The electron configuration of an atom is determined by placing electrons in the lowest energy orbitals available.
Electrons will occupy empty orbitals before pairing up.
Each orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied.
#11
What is the Bohr radius?
The radius of an atom in its ground state
The radius of the nucleus of an atom
The radius of the electron cloud in an atom
The radius of an electron's orbit in a hydrogen atom
#12
What is the maximum number of electrons that can occupy the third energy level?
#13
Which of the following orbitals has the highest energy?
#14
What is the Heisenberg Uncertainty Principle?
The exact position and momentum of a particle cannot both be precisely determined at the same time.
The total energy of an isolated system remains constant over time.
The probability of finding an electron in an atom is proportional to its wave function squared.
An electron occupies the lowest-energy orbital available.
#15
What is the Pauli Exclusion Principle?
No two electrons in an atom can have the same four quantum numbers
Electrons fill orbitals starting from the lowest energy levels
Electrons in the same orbital must have opposite spins
Each orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied
#16
What is the term for a series of spectral lines corresponding to transitions between two energy levels in an atom?
Balmer series
Rydberg series
Lyman series
Paschen series