Undid revision 2700803 by 2602:306:BCCA:4BD0:DD12:692F:4C69:7119 (discuss), and misc.
Authors: added namem
removed Rutherford model (it is outdated), edited captions, that's not what an orbital is, and misc. Electron cloud paragraph is rather confusing.
added name to author listm
closed circuits should be closed, separated "The bimetallic strip" and "Quiz" (question indentations), changed trimetallic to bimetallic, expanded quiz answers (not sure about #2b), and misc.
Quiz: "the the" to "the"m
asking for confimation that heat expansion is a major part of the reason why solids are generally denser than liquids
fixed example above to include mass; minorly corrected quiz
minor editing and slight reorganizingm
replaced misleading picture, reorganized paragraphs a bit
defined some words better, added some new vocab. bolding seems inconsistent.
Compass rose: new section
What do clouded leopards look like?: 2 inch vs. 2-inchm
no edit summarym
What do tigers look like?m