These keys/notes are meant to help students who were absent for a portion of the discussion or are eligible to receive copies of notes. If a student is still turning in work for late credit, I would assume that their answers are not exactly the same as these. If they are exactly the same, then no credit will be given for doing individual work.

Why do Atoms Combine and How do Elements Bond Answer Key
Sticky Molecule Answer Key
Water Sum of Parts Answer Key

15.1 Notes - Composition of Seawater