US$ 54.95
Glazed porcelain mercury trough at 75mm diameter with interior and exterior glazing
a 6V buzzer
Universal 2-input NAND gate module with red/green LED outputs and a printed truth table
5V flash-lamp bulbs in student-built circuits and small-scale optics demonstrations
74-Piece VSEPR Molecular Model Kit for Bond Orientation Subcategory_Specific Gravity Bottles Glazed porcelain mercury trough atUsed to teach VSEPR geometry, this 74 piece kit builds linear, bent, trigonal planar, pyramidal, tetrahedral, and trigonal bipyramidal molecules with lone pair orbitals and pear shaped bonds.
US$ 54.95
US$ 16.00
US$ 15.00
US$ 34.99
US$ 69.99
US$ 34.99