#1
What is the charge of a proton?
Positive
ExplanationProtons have a positive charge.
#2
Who proposed the plum pudding model of the atom?
J.J. Thomson
ExplanationJ.J. Thomson proposed the plum pudding model.
#3
What is the mass of an electron?
Approximately 1/1836 amu
ExplanationThe mass of an electron is approximately 1/1836 times the mass of a proton.
#4
Which subatomic particle has a negligible mass?
Electron
ExplanationElectron has a negligible mass compared to protons and neutrons.
#5
What is the shape of an s orbital?
Spherical
ExplanationAn s orbital has a spherical shape.
#6
What is the number of electrons in a neutral hydrogen atom?
1
ExplanationA neutral hydrogen atom has 1 electron.
#7
What is the maximum number of electrons in the third shell of an atom?
18
ExplanationThe third shell can hold a maximum of 18 electrons.
#8
What is the Bohr radius?
The average distance between the nucleus and the electron in the first shell
ExplanationBohr radius is the average distance between the nucleus and the electron in the first shell.
#9
Which scientist proposed the wave-particle duality of electrons?
Louis de Broglie
ExplanationLouis de Broglie proposed the wave-particle duality of electrons.
#10
What is the maximum number of electrons that can occupy the p subshell?
14
ExplanationThe maximum number of electrons that can occupy the p subshell is 14.
#11
What is the quantum number that describes the shape of an atomic orbital?
Angular momentum quantum number (l)
ExplanationThe angular momentum quantum number (l) describes the shape of an atomic orbital.
#12
What is the term for an atom that has gained or lost electrons?
Ion
ExplanationAn atom that has gained or lost electrons is called an ion.
#13
What is the principle behind the Pauli exclusion principle?
Two electrons in the same orbital must have opposite spins.
ExplanationThe Pauli exclusion principle states that two electrons in the same orbital must have opposite spins.
#14
What is the shape of a d orbital?
Dumbbell-shaped
ExplanationA d orbital has a dumbbell-shaped geometry.
#15
What is the term for the energy required to remove an electron from an atom?
Ionization energy
ExplanationThe energy required to remove an electron from an atom is called ionization energy.