Generated 22 October 2026. Sequences S01–S03; every video ≈ 75 seconds.
CSP-001 — Classify a representative element as a metal or nonmetal from its position in a supplied periodic table [e.g., classify Na as a metal and Cl as a nonmetal].
new version to watch — re-render+repair promoted 2026-10-06: full realistic table, H unshaded, 3 rules verbatim, 75.5 s
CSP-002 — State that a covalent bond consists of one or more pairs of valence electrons shared between two atoms [e.g., the two Cl atoms in Cl2 share one electron pair].
new version to watch — re-render+trim promoted 2026-10-06: valence restored, verdict frame unified, all quoted lines verbatim, 77.2 s
CSP-002 — State that a covalent bond consists of one or more pairs of valence electrons shared between two atoms [e.g., the two Cl atoms in Cl2 share one electron pair].
NEW VERSION to watch: shared-pair dots visible + the 50 s crossfade is now a hard cut (verified at half-second steps — no partial-species frame survives); audio identical, 74.0 s
CSP-003 — Classify a bond as generally ionic for a metal-nonmetal pair or covalent for a nonmetal-nonmetal pair [e.g., classify the bond type in NaCl as generally ionic].
new version to watch — re-render promoted 2026-10-06: 'generally' on the rule, L01's table, spans exact, 88.0 s (old cut was signed off)
CSP-004 — Explain that element identity and electronegativity provide an initial bond classification, but measured compound properties provide the best evidence for characterizing the bonding [e.g., use solid-versus-molten conductivity evidence to characterize an unknown salt].
new version to watch — re-render+repair promoted 2026-10-06: EN definition back, tin(IV) chloride, mechanism verbatim, 81.2 s
CSP-005 — Classify a covalent bond between atoms of similar electronegativity as effectively nonpolar and one between atoms of unequal electronegativity as polar, without using a universal numerical cutoff [e.g., treat C-H as effectively nonpolar and H-Cl as polar].
new version to watch — re-render+repairs promoted 2026-10-06: rules 3/3 verbatim, Pauling heading, stacked dots, 88.2 s
CSP-006 — State that a bond dipole is a separation of partial charge across a polar bond, with delta positive on the electron-poor end and delta negative on the electron-rich end [e.g., H(delta positive)-Cl(delta negative)].
new version to watch — re-render+repair promoted 2026-10-06: NaCl line corrected ('transferred to chlorine'), both mechanism sentences verbatim, lone pairs drawn, 88.2 s
CSP-007 — Predict that a bond-dipole arrow points toward the more electronegative atom [e.g., point the H-Cl bond-dipole arrow toward Cl].
new version to watch — dots edit promoted 2026-10-06: stacked pair offset toward Cl; audio identical
CSP-008 — State that, for comparable single bonds, a larger electronegativity difference produces a larger bond dipole [e.g., HF has a larger bond dipole than HCl].
new version to watch — edits promoted 2026-10-06: Pauling heading + arrows enter together; audio identical
CSP-009 — Explain that a larger electronegativity difference produces a larger bond dipole because the shared electron density is distributed more unevenly [e.g., electron density is shifted more strongly toward F in HF than toward Cl in HCl].
new version to watch — re-render+repair promoted 2026-10-06: 'nearly even contest' now over C–H, stacked dots, 89.4 s (old cut was signed off)
CSP-010 — Rank comparable single bonds by bond-dipole magnitude using their electronegativity differences [e.g., rank H-F above H-Cl above H-Br using supplied electronegativities].
NEW VERSION to watch: 'Electronegativity (Pauling scale)' heading + per-difference tags; audio identical; loudness flat (~3 dB below L08, within tolerance)
CSP-011 — Explain that polar bonds have some ionic character and that ionic and covalent bonding form a continuum rather than categories separated by a sharp boundary [e.g., describe HF as having more ionic character than HCl without calling either bond fully ionic].
new version to watch — re-render+repairs promoted 2026-10-06: recap fixed, Cl–Cl marker at covalent end, continuum rules verbatim, 89.7 s — now under cap (old 94.6 s cut retired)
CSP-012 — Classify a positively charged ion as a cation and a negatively charged ion as an anion [e.g., classify Na+ as a cation and Cl- as an anion].
new version to watch — re-render+repair promoted 2026-10-06: coinings verbatim, scripted closing restored as final line, 88.1 s
CSP-013 — State that a particulate model represents the identities, relative positions, and relevant charges of particles rather than showing a substance at visible scale [e.g., interpret labeled circles as Na+ and Cl- ions in a model].
72.0 s; delivered; BOTH quoted lines verbatim; grid fully labelled
CSP-014 — State that a crystal lattice is a systematic, periodic three-dimensional array of particles [e.g., Na+ and Cl- repeat throughout solid NaCl rather than forming separate NaCl molecules].
new version to watch — bullets edit promoted 2026-10-06: bullets start after the hard cut; audio identical
CSP-015 — Draw an ionic-solid particulate model as a repeating three-dimensional arrangement that places each ion among oppositely charged neighbors and avoids adjacent like charges [e.g., draw a NaCl lattice fragment with alternating Na+ and Cl- ions].
new version to watch — re-render+repair promoted 2026-10-06: all five drawing rules verbatim, 'To sum up' line gone, 87.0 s
CSP-016 — Identify how a supplied ionic-solid model maximizes opposite-charge attractions and minimizes like-charge repulsions [e.g., identify the oppositely charged nearest neighbors around a central Na+ ion].
73.5 s; delivered; closing reduced to 'That is ionic bonding.' — edit promoted 2026-10-06: repulsion arrows short, outward, clearly shorter than attraction; audio identical
CSP-017 — Evaluate whether a supplied ionic-solid model is consistent with a periodic lattice that maximizes attractions and minimizes repulsions, identifying one specific flaw if it is not [e.g., reject a NaCl model that places Na+ beside Na+ as nearest neighbors].
new version to watch — re-render promoted 2026-10-06: swap sentence matches the redesigned figure, closing verbatim, 89.5 s
CSP-018 — State that a metallic bond is the attraction between positive metal ions and valence electrons delocalized across the solid rather than assigned to one atom [e.g., model Cu(s) as Cu ions within a shared region of mobile valence electrons].
86.9 s; delivered; closing paraphrased; one continuous delocalized region, no negative ions — edit promoted 2026-10-06: zoom removed (sequential fade, no blended frame); audio identical
CSP-019 — Draw a metallic-solid particulate model as a repeating array of positive metal ions within a shared region of delocalized valence electrons [e.g., draw Fe ions surrounded by a continuous electron region].
87.4 s; delivered; closing paraphrased; whole-model-first then rule-by-rule rebuild correct
CSP-020 — Identify the positive metal ions and the delocalized electron region in a supplied metallic-solid model [e.g., identify which part of a copper model represents mobile valence electrons].
72.0 s; delivered; closing paraphrased; pointer labels exact
CSP-021 — Evaluate whether a supplied metallic-solid model shows positive metal ions within delocalized electrons, identifying one specific flaw if it does not [e.g., reject a model that assigns a separate fixed electron pair to each metal ion].
81.0 s; delivered; closing paraphrased; tick→cross minimal pair + dashed-outline close all correct
CSP-022 — State that an alloy is a metallic material containing a mixture of a metal with one or more other elements [e.g., brass contains Cu mixed with Zn].
not watched — RE-CUT PROMOTED 2026-10-06 (padding trim): all protected lines exact, 80.0 s
CSP-023 — Classify an alloy description as interstitial when smaller atoms occupy spaces between metal atoms or substitutional when comparable-sized atoms replace metal atoms [e.g., classify carbon in steel as interstitial and zinc in brass as substitutional].
not watched — RE-CUT + REPAIR PROMOTED 2026-10-06: rule/mechanism/terms byte-exact, referrals removed, 77.5 s
CSP-023 — Classify an alloy description as interstitial when smaller atoms occupy spaces between metal atoms or substitutional when comparable-sized atoms replace metal atoms [e.g., classify carbon in steel as interstitial and zinc in brass as substitutional].
not watched — RE-CUT + REPAIR PROMOTED 2026-10-06: coining form restored exactly, 83.1 s
CSP-024 — Predict whether an alloy will be interstitial or substitutional from the relative radii of its component atoms [e.g., predict that much smaller C atoms occupy interstices in an Fe lattice].
not watched — RE-CUT + REPAIR EDIT PROMOTED 2026-10-06: all four protected sentences exact (post-edit), radii table on frame (70/140/135 pm), 88.7 s; replaces the held wave-1 cut
CSP-025 — Identify a supplied alloy particulate model as interstitial or substitutional from the positions and relative sizes of its atoms [e.g., identify small atoms between lattice positions as an interstitial alloy].
not watched — RE-CUT PROMOTED 2026-10-05: protected rule sentences 2/2 verbatim, closing verbatim, 76.5 s, loudness flat; replaces the held wave-1 cut (electron sea now in every model)
CSP-026 — Draw an interstitial or substitutional alloy model from supplied relative-radius information while retaining the essential features of metallic bonding [e.g., draw small C atoms in interstices of an Fe lattice within delocalized electrons].
not watched — recut+repairs promoted 2026-10-06: all four step rules + mechanism verbatim, electron sea in every model, 88.6 s