CHEM 1030 Final Exam Questions With Correct Answers.

CHEM 1030 Final Exam Questions With
Correct Answers

Filtration - CORRECT ANSWER✔✔-Separates solid substances from liquids and
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solutions; based on a difference in size.
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Distillation - CORRECT ANSWER✔✔-Separates a homogeneous mixture based on
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differences in boiling points. | | |




Chromatography (paper) - CORRECT ANSWER✔✔-Separates substances on the
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basis of differences in solubility in a solvent.
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Intensive Properties - CORRECT ANSWER✔✔-Independent of the amount of
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substance present. |




| -Density, boiling point
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Extensive Properties - CORRECT ANSWER✔✔-Dependent on the amount of
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substance present. |




| -Mass, volume.
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Atomic Number and Mass Number - CORRECT ANSWER✔✔-
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Isotopes - CORRECT ANSWER✔✔-Atoms with identical atomic numbers but
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different mass numbers
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,Mole - CORRECT ANSWER✔✔-: the amount of a substance that contains as many
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elementary entities as there are atoms in exactly 12 g C-12
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Avogadro's Number (NA) - CORRECT ANSWER✔✔-6.0221418 x10^23
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Electrostatic energy - CORRECT ANSWER✔✔-potential energy that results from
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the interaction of charged particle
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Quantized energy (Max Planck) - CORRECT ANSWER✔✔-Energy can be absorbed
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or released from atoms only in certain amounts (quanta).
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Heisenberg's Uncertainty Principle - CORRECT ANSWER✔✔-the more precisely
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the momentum (mu) of a particle is known, the less precisely its position (x) is
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known


Principal Quantum Number (n) - CORRECT ANSWER✔✔-designates size of the
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orbital (shell) |




| -n values are integers >0
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Angular Momentum Quantum Number (l) - CORRECT ANSWER✔✔-describes the
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shape of the orbital (subshells)
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| -l values are integers ranging from 0 to n − 1 for each value of n
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Magnetic Quantum Number (ml) - CORRECT ANSWER✔✔-specifies the three-
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dimensional orientation of the orbital | | | |

, | -Values are integers ranging from -l ...0 .... l
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Electron Spin Quantum Number (ms) - CORRECT ANSWER✔✔-The "spin" of an
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electron describes its magnetic field, which affects its energy.
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| -Allowed values: +1/2 and −1/2. | | | |




Degenerate orbitals - CORRECT ANSWER✔✔-orbitals on the same energy level
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have the same energy
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Aufbau principle - CORRECT ANSWER✔✔-electrons fill orbitals starting with the
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lowest n before moving to higher energy obritals
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Pauli Exclusion Principle - CORRECT ANSWER✔✔-No two electrons in the same
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atom can have the same set of four quantum numbers, n, l, ml, ms
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Hund's Rule - CORRECT ANSWER✔✔-For degenerate orbitals: electrons fill each
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orbital singly before any orbital get a second electron
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Effective Nuclear Charge (Zeff) - CORRECT ANSWER✔✔-is the actual magnitude of
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positive charge that is "experienced" by an electron in the atom
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Effective Nuclear Charge Trends - CORRECT ANSWER✔✔-Row (left to right across
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a period), Zeff increases
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| -Z increases, but the # of core electrons does not change
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