CHEM 120 LAB PRACTICUM
INTRODUCTION TO GENERAL ORGANIC
AND BIOLOGICAL CHEMISTRY NEW
UPDATE FINAL STUDY GUIDE 2026
QUESTIONS WITH ANSWERS GRADED A+
⫸ Passing Points Answer: Need a total of 228 points to pass the core
(Lab)
⫸ Observation Answer: Careful noting and recording of natural events.
Identifies patterns or unexpected results.
⫸ Hypothesis Answer: Testable, specific statement based on
observations. Proposes a possible explanation.
⫸ Experiment Answer: Controlled procedure to test predictions.
⫸ Results Answer: Data generated and/or evaluated to support or refute
the hypothesis.
⫸ Theory Answer: Broad explanation of 'why' based on extensive
evidence.
, ⫸ Independent Variable Answer: 'I' change it → You control or change
this variable on purpose.
⫸ Dependent Variable Answer: 'Depends' on what you changed → It's
the outcome you measure.
⫸ Example of Variables Answer: If I water plants with different liquids
(independent), then how much they grow changes (dependent).
⫸ Protons Answer: (+1 charge) - in nucleus
⫸ Neutrons Answer: (0 charge) - in nucleus
⫸ Electrons Answer: (-1 charge) - outside nucleus
⫸ Ions Answer: Atoms with a charge.
⫸ Cation Answer: Positive charge, lost electrons, metal.
⫸ Anion Answer: Negative charge, gained electrons, nonmetal.
⫸ Isotopes Answer: Same element but different number of neutrons (so
different mass number).
INTRODUCTION TO GENERAL ORGANIC
AND BIOLOGICAL CHEMISTRY NEW
UPDATE FINAL STUDY GUIDE 2026
QUESTIONS WITH ANSWERS GRADED A+
⫸ Passing Points Answer: Need a total of 228 points to pass the core
(Lab)
⫸ Observation Answer: Careful noting and recording of natural events.
Identifies patterns or unexpected results.
⫸ Hypothesis Answer: Testable, specific statement based on
observations. Proposes a possible explanation.
⫸ Experiment Answer: Controlled procedure to test predictions.
⫸ Results Answer: Data generated and/or evaluated to support or refute
the hypothesis.
⫸ Theory Answer: Broad explanation of 'why' based on extensive
evidence.
, ⫸ Independent Variable Answer: 'I' change it → You control or change
this variable on purpose.
⫸ Dependent Variable Answer: 'Depends' on what you changed → It's
the outcome you measure.
⫸ Example of Variables Answer: If I water plants with different liquids
(independent), then how much they grow changes (dependent).
⫸ Protons Answer: (+1 charge) - in nucleus
⫸ Neutrons Answer: (0 charge) - in nucleus
⫸ Electrons Answer: (-1 charge) - outside nucleus
⫸ Ions Answer: Atoms with a charge.
⫸ Cation Answer: Positive charge, lost electrons, metal.
⫸ Anion Answer: Negative charge, gained electrons, nonmetal.
⫸ Isotopes Answer: Same element but different number of neutrons (so
different mass number).
