MODERN QUANTUM MECHANICS ACTUAL
EXAM PAPER 2026 QUESTIONS WITH
COMPLETE SOLUTIONS GRADED A+
◉ Aufbau Principle. Answer: Electrons fill an element's orbitals in order
of increasing energy.
◉ Pauli Exclusion Principle. Answer: When two electrons share an
orbital, they must have different spin values (for example "up" and
"down")
◉ Principal energy level. Answer: The_____ is designated by the
quantum number n or the quantum number where n= 1, 2, 3, and 4
◉ Electron configuration. Answer: The distribution of electrons among
the orbitals of an atom. It describes where the electrons are found and
what energies they have.
◉ Spectroscopic Notation. Answer: When you have an atom that has a
large number of electrons it is easier to use electron configuration in a
compact form using superscript following the sub shell name to indicate
the number of electrons in each sub shell.
EXAM PAPER 2026 QUESTIONS WITH
COMPLETE SOLUTIONS GRADED A+
◉ Aufbau Principle. Answer: Electrons fill an element's orbitals in order
of increasing energy.
◉ Pauli Exclusion Principle. Answer: When two electrons share an
orbital, they must have different spin values (for example "up" and
"down")
◉ Principal energy level. Answer: The_____ is designated by the
quantum number n or the quantum number where n= 1, 2, 3, and 4
◉ Electron configuration. Answer: The distribution of electrons among
the orbitals of an atom. It describes where the electrons are found and
what energies they have.
◉ Spectroscopic Notation. Answer: When you have an atom that has a
large number of electrons it is easier to use electron configuration in a
compact form using superscript following the sub shell name to indicate
the number of electrons in each sub shell.
