Chemistry Archives - The Science Notes

Hand-drawn educational diagram of an atom's electron shells and energy levels, using blue ink for low-energy inner shells and red ink to highlight high-energy valence electrons.

February 5, 2026 Biochemistry Chemistry

Electrons and Energy Levels: Electron Shells, Orbitals, and Chemical Bonding

Electrons orbit atoms in energy levels, forming valence electrons that drive chemical bonding and element behavior. Read more

Hand-drawn atomic structure diagram showing a central nucleus with protons and neutrons, surrounded by a shaded electron cloud and handwritten labels for atomic number and charges.

February 5, 2026February 5, 2026 Biochemistry Chemistry

Atomic Structure: Atoms and the Subatomic Particles

Explore atomic structure, subatomic particles, and atomic theory to understand how atoms form matter and chemical behavior. Read more

Hand-drawn periodic table sketch on notebook paper highlighting the major elements of life (H, C, N, O), secondary elements, and trace elements with handwritten educational annotations.

February 5, 2026February 5, 2026 Biochemistry Chemistry

Elements of Life: Periodic Table and the Building Blocks of Living Matter

Learn how elements, the periodic table, and trace minerals form living matter and affect human health. Read more