MTL200 Midterm Exam Questions and
Answers Graded A+
What are the three primary material eras? - Correct answer-Stone Age, Bronze
Age, Iron Age
What are the four levels of Material Structures? - Correct answer-Subatomic
Structures, Atomic Structures, Micro structures, Macro structures
What are the three basic materials? - Correct answer-Metals, Ceramics and
Polymers
Advanced Materials - Correct answer-semiconductors, biomaterials, smart
materials, nanomaterials
atomic number - Correct answer-the number of protons in the nucleus of an atom,
usually equals the number of neutrons
Isotope - Correct answer-Atoms of the same element that have different numbers
of neutrons
formula for atomic mass - Correct answer-Atomic Number + Neutrons
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, mole - Correct answer-the SI base unit used to measure the amount of a substance
6.022 x 10^23
Bohr's Atomic Model - Correct answer-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] - Correct answer-Modern model
of the atom, atoms have electrons in "orbitals" that are like clouds around the
nucleus
Quantum Numbers - Correct answer-A set of four numbers that specify the
properties of atomic orbitals and the properties of electrons in orbitals
Principal Quantum Number (s) - Correct answer-symbolized by n, indicates the
main energy level/shell occupied by the electron. N is the row in the periodic table
Secondary Quantum Number - Correct answer-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 - Correct answer-The electrons in the outermost shell, which
participate in the bonding between atoms.
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Answers Graded A+
What are the three primary material eras? - Correct answer-Stone Age, Bronze
Age, Iron Age
What are the four levels of Material Structures? - Correct answer-Subatomic
Structures, Atomic Structures, Micro structures, Macro structures
What are the three basic materials? - Correct answer-Metals, Ceramics and
Polymers
Advanced Materials - Correct answer-semiconductors, biomaterials, smart
materials, nanomaterials
atomic number - Correct answer-the number of protons in the nucleus of an atom,
usually equals the number of neutrons
Isotope - Correct answer-Atoms of the same element that have different numbers
of neutrons
formula for atomic mass - Correct answer-Atomic Number + Neutrons
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, mole - Correct answer-the SI base unit used to measure the amount of a substance
6.022 x 10^23
Bohr's Atomic Model - Correct answer-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] - Correct answer-Modern model
of the atom, atoms have electrons in "orbitals" that are like clouds around the
nucleus
Quantum Numbers - Correct answer-A set of four numbers that specify the
properties of atomic orbitals and the properties of electrons in orbitals
Principal Quantum Number (s) - Correct answer-symbolized by n, indicates the
main energy level/shell occupied by the electron. N is the row in the periodic table
Secondary Quantum Number - Correct answer-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 - Correct answer-The electrons in the outermost shell, which
participate in the bonding between atoms.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
