NIOS Chemistry 313

Lesson 4 Animations

Interactive visual scenes for chemical bonding: ionic transfer, covalent sharing, VSEPR electron-pair repulsion, and sp³ hybridization. Use them as teaching aids or quick revision visuals.

Ionic Bond Formation

Sodium transfers one valence electron to chlorine. After transfer, Na⁺ and Cl^- attract electrostatically.

Metal atom Non-metal atom Transferred electron

Metal loses electron and forms a cation.
Non-metal gains electron and forms an anion.
Opposite charges create the ionic bond.

Covalent Bond Formation

Two hydrogen atoms move close enough to share a pair of electrons. The shared pair creates a stable single bond.

Hydrogen atoms Shared electron pair

This scene represents electron sharing rather than electron transfer, which is the key distinction from ionic bonding.

VSEPR Repulsion in Water

Electron pairs around oxygen push apart. Two lone pairs occupy more space, forcing the bond pairs down and giving water its bent shape.

Central atom Bond pairs Lone pairs

Repulsion order: LP-LP > LP-BP > BP-BP. That is why H₂O is bent instead of linear.

sp³ Hybridization

One s and three p orbitals mix to form four equivalent hybrid orbitals directed tetrahedrally, as in methane.

Carbon center Equivalent hybrid orbitals

Exam memory hook: sp linear, sp² trigonal planar, sp³ tetrahedral.

Electron Pair Focus

Chemistry diagram showing electron pairs.

Interactive image layer Dynamic focus glow Orbit motion markers

This works well as a teaching pause-point for lone pairs versus bonding pairs without replacing the original image.

Suggested Classroom Use

Pause on each frame and explain what is changing physically.
Use the ionic and covalent scenes to compare transfer vs sharing.
Use the VSEPR scene to explain why lone pairs distort shape.
Use the hybridization scene as a quick visual cue before structure questions.