Page |1
MTL200 Midterm Questions and Correct
Answers/ Latest Update / Already Graded
What are the three primary material eras?
Ans: Stone Age, Bronze Age, Iron Age
What are the four levels of Material Structures?
Ans: Subatomic Structures, Atomic Structures, Micro
structures, Macro structures
What are the three basic materials?
Ans: Metals, Ceramics and Polymers
Advanced Materials
Ans: semiconductors, biomaterials, smart materials,
nanomaterials
atomic number
Ans: the number of protons in the nucleus of an atom, usually
equals the number of neutrons
All rights reserved © 2025/ 2026 |
, Page |2
Isotope
Ans: Atoms of the same element that have different numbers
of neutrons
formula for atomic mass
Ans: Atomic Number + Neutrons
mole
Ans: the SI base unit used to measure the amount of a
substance 6.022 x 10^23
Bohr's Atomic Model
Ans: Atoms have levels surrounding the nucleus where
electrons are found. Levels can hold different amounts of
electrons depending on their distance from the nucleus.
Wave-Mechanical Model [Schrodinger's Model]
Ans: Modern model of the atom, atoms have electrons in
"orbitals" that are like clouds around the nucleus
Quantum Numbers
All rights reserved © 2025/ 2026 |
, Page |3
Ans: A set of four numbers that specify the properties of
atomic orbitals and the properties of electrons in orbitals
Principal Quantum Number (s)
Ans: symbolized by n, indicates the main energy level/shell
occupied by the electron. N is the row in the periodic table
Secondary Quantum Number
Ans: symbol = l; tells which sublevel the electron is on and
determines the shape of the orbital; sublevels are repetitively
numbered and also lettered
Valence Electrons
Ans: The electrons in the outermost shell, which participate in
the bonding between atoms.
Pauli Exclusion Principle
Ans: An atomic orbital may describe at most two electrons,
each with opposite spin direction
Bonding Energy
All rights reserved © 2025/ 2026 |
MTL200 Midterm Questions and Correct
Answers/ Latest Update / Already Graded
What are the three primary material eras?
Ans: Stone Age, Bronze Age, Iron Age
What are the four levels of Material Structures?
Ans: Subatomic Structures, Atomic Structures, Micro
structures, Macro structures
What are the three basic materials?
Ans: Metals, Ceramics and Polymers
Advanced Materials
Ans: semiconductors, biomaterials, smart materials,
nanomaterials
atomic number
Ans: the number of protons in the nucleus of an atom, usually
equals the number of neutrons
All rights reserved © 2025/ 2026 |
, Page |2
Isotope
Ans: Atoms of the same element that have different numbers
of neutrons
formula for atomic mass
Ans: Atomic Number + Neutrons
mole
Ans: the SI base unit used to measure the amount of a
substance 6.022 x 10^23
Bohr's Atomic Model
Ans: Atoms have levels surrounding the nucleus where
electrons are found. Levels can hold different amounts of
electrons depending on their distance from the nucleus.
Wave-Mechanical Model [Schrodinger's Model]
Ans: Modern model of the atom, atoms have electrons in
"orbitals" that are like clouds around the nucleus
Quantum Numbers
All rights reserved © 2025/ 2026 |
, Page |3
Ans: A set of four numbers that specify the properties of
atomic orbitals and the properties of electrons in orbitals
Principal Quantum Number (s)
Ans: symbolized by n, indicates the main energy level/shell
occupied by the electron. N is the row in the periodic table
Secondary Quantum Number
Ans: symbol = l; tells which sublevel the electron is on and
determines the shape of the orbital; sublevels are repetitively
numbered and also lettered
Valence Electrons
Ans: The electrons in the outermost shell, which participate in
the bonding between atoms.
Pauli Exclusion Principle
Ans: An atomic orbital may describe at most two electrons,
each with opposite spin direction
Bonding Energy
All rights reserved © 2025/ 2026 |
