MTL200 Midterm UPDATED ACTUAL Questions and CORRECT Answers
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Course
MTL 200
Institution
MTL 200
MTL200 Midterm UPDATED ACTUAL
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 structu...
MTL200 Midterm UPDATED ACTUAL
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
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]
What is the general trend on the periodic table for increasing the Electronegativity? -
CORRECT ANSWER✔✔- The electronegativity usually increases from left to right and
bottom to top. [MC]
Ionic Bonding and Directonality - CORRECT ANSWER✔✔- Chemical bonding that results
from the electrical attraction between cations and anions. Electron is given. Non-directional
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