CHEM 111 – General Chemistry 1
Mid-term Examination 1 Study Guide
Mid-term Examination 1 will be given during the scheduled class period on Friday Sept 16
Examination Coverage:
Chapter 1 and Chapter 2
Chapter 1: Chemistry and Measurement
Know how to:
 Classify physical vs. chemical changes/properties
 Classify substances as atoms, elements, molecules or compounds
 Interpret and convert between values in scientific notation vs. standard format
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Report measurements as a number with a unit
Distinguish between precision and accuracy
Tell which digit is uncertain in a measurement
Count and use significant digits in calculations
Define exact numbers
 Define conversion factors and be able to determine conversion factors appropriately
 Convert between different units of measurement (a table of the metric prefixes will be provided)
 Perform dimensional analysis calculations, including density
Chapter 2: Atoms, Molecules, and Ions
Know how to:
 Explain Dalton’s Atomic Theory
 Identify the major features of the 3 subatomic particles (where they are found in an atom, relative masses,
charge)
 Count protons, neutrons and electrons in both neutral atoms and charged ions
 Write nuclide symbols ( AZElement symbol) for different isotopes of an element; where A is the mass number
and Z is the atomic number
 Identify the difference between different elements, isotopes and ions
 Calculate atomic mass from information about relative abundance of isotopes
 Identify major groups on the periodic table (alkali metals, halogens, metals, etc.)
 Locate metals, metalloids and non-metals on the periodic table
 Distinguish between molecular and ionic compounds
 Determine the formula of ionic compounds based on their constituent ions
 Balance a chemical reaction
A periodic table and any relevant constants and equations will be provided. You must bring your own calculator (these
cannot be shared).