WGU D425 CERTIFICATION QUIZ & FULL
EXAM SET CONFIDENT PASS 2026.
⫸ Combustion Reaction. Answer: a chemical reaction that occurs
when a substance reacts with oxygen, releasing energy in the form of
heat and light
⫸ Redox Reaction. Answer: A chemical reaction involving the
transfer of one or more electrons from one reactant to another; also
called oxidation-reduction reaction.
⫸ Naming Conventions. Answer: Rules for naming covalent, ionic,
and acidic compounds
⫸ naming covalent compounds. Answer: Name of 1st and 2nd
element add a prefix to indicate the number of atoms:1-mono, 2-di, 3-
tri, 4-tetra, 5-penta, 6-hexa, 7-hepta, 8-octa, 9-nona, 10-deca
⫸ naming ionic compounds. Answer: metal (positive ion) comes first,
then negative ion (one syllable + ide)
⫸ Binary acid naming (Hydrogen + Nonmetal). Answer: hydro + root
+ ic acid
⫸ Oxyacids (hydrogen, plus polyatomic ion containing oxygen).
Answer: If the polyatomic acid ends in "-ate"
, Change the ending to "-ic acid"
⫸ Acids ending in "-ite". Answer: Change the ending to "-ous
"followed by "acid"
⫸ Common metal ions. Answer: Familiarity with charges of group 1,
group 2, Al, silver, zinc, cadmium
⫸ Common non-metal ions. Answer: Understanding charges of group
15, group 16, group 17 elements
⫸ VSEPR shapes. Answer: Shapes of molecules based on Valence
Shell Electron Pair Repulsion theory
⫸ Linear. Answer: 180 degrees
⫸ trigonal planar. Answer: 120 degrees, 3 bonds
⫸ Tetrahedral. Answer: 109.5 degrees, 4 bonds
⫸ Trigonalbipyramidal. Answer: 5 atoms bonded to central atom, 0
lone pairs
⫸ Octahedral. Answer: 90 degrees, 6 bonds, 0 lone pairs
EXAM SET CONFIDENT PASS 2026.
⫸ Combustion Reaction. Answer: a chemical reaction that occurs
when a substance reacts with oxygen, releasing energy in the form of
heat and light
⫸ Redox Reaction. Answer: A chemical reaction involving the
transfer of one or more electrons from one reactant to another; also
called oxidation-reduction reaction.
⫸ Naming Conventions. Answer: Rules for naming covalent, ionic,
and acidic compounds
⫸ naming covalent compounds. Answer: Name of 1st and 2nd
element add a prefix to indicate the number of atoms:1-mono, 2-di, 3-
tri, 4-tetra, 5-penta, 6-hexa, 7-hepta, 8-octa, 9-nona, 10-deca
⫸ naming ionic compounds. Answer: metal (positive ion) comes first,
then negative ion (one syllable + ide)
⫸ Binary acid naming (Hydrogen + Nonmetal). Answer: hydro + root
+ ic acid
⫸ Oxyacids (hydrogen, plus polyatomic ion containing oxygen).
Answer: If the polyatomic acid ends in "-ate"
, Change the ending to "-ic acid"
⫸ Acids ending in "-ite". Answer: Change the ending to "-ous
"followed by "acid"
⫸ Common metal ions. Answer: Familiarity with charges of group 1,
group 2, Al, silver, zinc, cadmium
⫸ Common non-metal ions. Answer: Understanding charges of group
15, group 16, group 17 elements
⫸ VSEPR shapes. Answer: Shapes of molecules based on Valence
Shell Electron Pair Repulsion theory
⫸ Linear. Answer: 180 degrees
⫸ trigonal planar. Answer: 120 degrees, 3 bonds
⫸ Tetrahedral. Answer: 109.5 degrees, 4 bonds
⫸ Trigonalbipyramidal. Answer: 5 atoms bonded to central atom, 0
lone pairs
⫸ Octahedral. Answer: 90 degrees, 6 bonds, 0 lone pairs
