Chemistry Cube — Atomic Structure

The atom is matter's Lego. The model makes protons, neutrons, electrons visible. Indirect aim: chemistry, preparation for bonding and quantum, appreciation of matter's structure.

• Framework: Montessori
• Unit: Sensorial
• Learning area: Algebraic Sensorial
• Level: Ages 9-11

Objectives

• Model atomic structure: nucleus with protons/neutrons, electron shells
• Understand atomic number as protons
• Understand mass number
• Build models for first 20 elements

Materials

• Atom model kit (nucleus ball, electron orbits, proton/neutron/electron pieces)
• Periodic table
• Recording paper

Instructions

1. Build hydrogen: 1 proton in nucleus, 1 electron. 2. Build helium: 2 protons, 2 neutrons, 2 electrons. 3. Continue: lithium (3), carbon (6), oxygen (8). 4. Note electron shells fill: 2 in first, 8 in second. 5. Model sodium (11) through argon (18). 6. Compare to periodic table positions. 7. Record each atom. 8. Research what atomic number and mass number mean.

Educator tip

The atom is imaginary at our scale but real. Drawing the Bohr model after building the physical makes it memorable.

Assessment

Observe correct construction, accurate naming, and link to periodic table.

More from Sensorial

• Fraction Insets — Advanced Operations Sensorial
• Exponent Materials — Powers of 10
• Geometric Solids — Surface Area and Volume
• Geometric Form — Stick Material
• Classified Sensorial Nomenclature
• Musical Scales and Intervals
• Tangram Puzzle — Seven-Piece Geometry
• Crystal Structure — Symmetry in Minerals