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ACS GEN CHEM SECOND SEMESTER EXAM
QUESTIONS AND ANSWERS 2025
Ion - .....ANSWER ...✔✔ A species of an element in
which the number of electrons does not equal the
number of protons.
Isotope - .....ANSWER ...✔✔ Each isotope of an atom
has a different number of neutrons.
Isoelectric - .....ANSWER ...✔✔ Two atoms with the
same charge.
Isotopic - .....ANSWER ...✔✔ Two atoms with the same
number of neutrons.
Transition Metal Orbitals - .....ANSWER ...✔✔ The 4s
orbital is filled before the 3d orbital, but listed after.
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Paramagnetic - .....ANSWER ...✔✔ Atoms that possess
a permanent magnetic charge due to the presence of
unpaired electrons.
Electropositive - .....ANSWER ...✔✔ Tending to lose
electrons and form positive ions.
Tetrahedral Bond Angle - .....ANSWER ...✔✔ 109.5°
Resonance Structures - .....ANSWER ...✔✔ Two
equally correct arrangements of one molecule's
electrons; generally the molecule exists as an average
of the two.
Polar Molecule - .....ANSWER ...✔✔ A molecule that is
mostly positive on one side and mostly negative on the
other.
sp³ Orbital - .....ANSWER ...✔✔ An orbital composed
of one s orbital and three p orbitals; can hold eight total
electrons. Tetrahedral.
ACS GEN CHEM SECOND SEMESTER EXAM
QUESTIONS AND ANSWERS 2025
Ion - .....ANSWER ...✔✔ A species of an element in
which the number of electrons does not equal the
number of protons.
Isotope - .....ANSWER ...✔✔ Each isotope of an atom
has a different number of neutrons.
Isoelectric - .....ANSWER ...✔✔ Two atoms with the
same charge.
Isotopic - .....ANSWER ...✔✔ Two atoms with the same
number of neutrons.
Transition Metal Orbitals - .....ANSWER ...✔✔ The 4s
orbital is filled before the 3d orbital, but listed after.
, 2|Page
Paramagnetic - .....ANSWER ...✔✔ Atoms that possess
a permanent magnetic charge due to the presence of
unpaired electrons.
Electropositive - .....ANSWER ...✔✔ Tending to lose
electrons and form positive ions.
Tetrahedral Bond Angle - .....ANSWER ...✔✔ 109.5°
Resonance Structures - .....ANSWER ...✔✔ Two
equally correct arrangements of one molecule's
electrons; generally the molecule exists as an average
of the two.
Polar Molecule - .....ANSWER ...✔✔ A molecule that is
mostly positive on one side and mostly negative on the
other.
sp³ Orbital - .....ANSWER ...✔✔ An orbital composed
of one s orbital and three p orbitals; can hold eight total
electrons. Tetrahedral.
