Constitution of matter
From atom to bond: atomic structure, electron configuration, periodic classification, trends, covalent/ionic/metallic bonding, VSEPR geometry.
- 01
Atomic structure
From Bohr to the simplified quantum model: K, L, M shells, s/p/d orbitals. Electron configuration of the elements.
12 min - 02
Electron configuration
Filling rules (Aufbau, Pauli, Hund), notations like [Ar] 4s² 3d⁶, valence electrons. Iron, copper, transition metal cases.
12 min - 03
Periodic classification
Reading the periodic table: groups, periods, s/p/d/f blocks. Families, metals/non-metals/metalloids.
11 min - 04
Periodic trends
Evolution of atomic radius, ionization energy, electronegativity. Understanding trends by reading the table.
12 min - 05
Covalent bonding
Sharing electrons, duet/octet rule, Lewis structures. Single, double, triple bonds.
11 min - 06
Ionic bonding
Electron transfer from metal to non-metal. Ionic crystal lattice, lattice energy (qualitative).
10 min - 07
Metallic bonding
Delocalized electron gas model. Consequences: conductivity, ductility, metallic luster.
9 min - 08
Molecular geometry (VSEPR)
Predicting molecular shape from the central atom's electron pairs. Linear, trigonal planar, tetrahedral, etc.
11 min