MTL200 Midterm UPDATED ACTUAL
Exam Questions and CORRECT Answers
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
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.
Pauli Exclusion Principle - CORRECT ANSWER - An atomic orbital may describe at
most two electrons, each with opposite spin direction
Bonding Energy - CORRECT ANSWER - The energy required to separate two atoms that
are chemically bonded to each other to an infinite distance
What does a column group represent in a periodic table? - CORRECT ANSWER - Similar
valence electron configurations/structure and chemical/physical properties
Electropositive Elements - CORRECT ANSWER - The elements have a tendency to
release valence electrons (metals) and have a low electronegativity
Electronegative Elements - CORRECT ANSWER - The elements having a tendency to
accept valence electrons (non-metals) and have a high electronegativity. [MC]
Exam Questions and CORRECT Answers
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
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.
Pauli Exclusion Principle - CORRECT ANSWER - An atomic orbital may describe at
most two electrons, each with opposite spin direction
Bonding Energy - CORRECT ANSWER - The energy required to separate two atoms that
are chemically bonded to each other to an infinite distance
What does a column group represent in a periodic table? - CORRECT ANSWER - Similar
valence electron configurations/structure and chemical/physical properties
Electropositive Elements - CORRECT ANSWER - The elements have a tendency to
release valence electrons (metals) and have a low electronegativity
Electronegative Elements - CORRECT ANSWER - The elements having a tendency to
accept valence electrons (non-metals) and have a high electronegativity. [MC]
