Constitution of matter
From atom to bond: atomic structure, electron configuration, periodic classification, trends, covalent/ionic/metallic bonding, VSEPR geometry.
- Lesson 0112 min
Atomic structure
From Bohr to the simplified quantum model: K, L, M shells, s/p/d orbitals. Electron configuration of the elements.
- Lesson 0212 minComing soon
Electron configuration
Filling rules (Aufbau, Pauli, Hund), notations like [Ar] 4s² 3d⁶, valence electrons. Iron, copper, transition metal cases.
- Lesson 0311 minComing soon
Periodic classification
Reading the periodic table: groups, periods, s/p/d/f blocks. Families, metals/non-metals/metalloids.
- Lesson 0412 minComing soon
Periodic trends
Evolution of atomic radius, ionization energy, electronegativity. Understanding trends by reading the table.
- Lesson 0511 minComing soon
Covalent bonding
Sharing electrons, duet/octet rule, Lewis structures. Single, double, triple bonds.
- Lesson 0610 minComing soon
Ionic bonding
Electron transfer from metal to non-metal. Ionic crystal lattice, lattice energy (qualitative).
- Lesson 079 minComing soon
Metallic bonding
Delocalized electron gas model. Consequences: conductivity, ductility, metallic luster.
- Lesson 0811 minComing soon
Molecular geometry (VSEPR)
Predicting molecular shape from the central atom's electron pairs. Linear, trigonal planar, tetrahedral, etc.