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  🧪 THE MAGIC LAB 🧪 A Chemistry Awareness Play for School Assembly   Prepared by: Sachin Badoni, Senior Chemistry Teacher     CHARACTERS RIYA   —   A curious student in Grade 8 DR. CHEM   —   The Spirit of Chemistry (white lab coat + cape) CARBON   —   Element character (black costume, 'C' on chest) HYDROGEN   —   Element character (white costume, 'H' on chest) OXYGEN   —   Element character (blue costume, 'O' on chest) NARRATOR   —   On-stage or off-stage voice   PROPS & MATERIALS NEEDED For pH Demo: Red cabbage juice (boiled), vinegar, baking soda solution, water in 3 clear glasses, spoon For CO₂ Demo: Baking soda + vinegar in a jar, a lit candle safely mounted on a table For Elephant Toothpaste: 6% H₂O₂, yeast + warm water, dish soap, food colour, tall cylinder, tray   PRE-SHOW NOTE TO AUDIENCE [Teacher / Narrator addresses audience befor...

CRYSTAL SYSTEMS There is seven types of Crystal system: 1. Cubic  2. Tetragonal 3. Orthorhombic 4. Monoclinic 5. Triclinic 6. Hexagonal 7. Rhombohedral or Trigonal "Crystal systems are defined based on 'Parameters' of a Unit cell :  A unit cell is characterized by six parameters.  a, b, c = edge length alpha, beta, gama = angles • Alpha(L) : angles lies between edges b & c.  • Beta(B) : angles lies between edges a & b.  • Gama(Y) : angles lies between edges a & b.  Parameters are in various Crystal system : The following chart are defined that parameters of various Crystal system.  Variations within a Crystal System: Following types of variations we can see in the Crystal system.  A. Primitive Unit Cells/Simple Unit Cell(PC or SC)  B. Body-Centred Unit Cell(BCC)    C. Face-Centred Unit Cell(FCC)  D. End-Centre...