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Take your salt crystal lessons from 2-D to 3D. These colorful sodium chloride ion models will help your students discover the cubic nature of salt crystals, efficient lattice packing, high melting temperature, brittleness and cleavage planes.
Find information about the contents of your NaCl Lattice©.
Your students will use magnetic sodium chloride ion models and a guided-inquiry approach to explore the properties of NaCl. They will feel the ionic bonding between sodium and chloride and learn about the postitive and negative charges of sodium and chloride, before discovering the 6:6 coordination in sodium and chloride crystal formation. From there they can explore the strength and brittleness of NaCl crystals. Additional activities can include comparing the sodium chloride model to rock salt, table salt and/or 3D Molecular Designs’ Water Kits©.
This activity, intended for grades 3-5, uses the sodium chloride magnetic models and a guided-inquiry approach. It will help students begin to recognize multiple ways of solving a problem, practice pattern recognition, and make and test predictions. Students will examine the NaCl Lattice© and determine the number of blue and green balls in the cube. Then they will predict how many smaller cubes can be made from larger cubes, and test their predictions.
View magnified images of salt crystals and an explanation of the relationship between the arrangement of the ions in a typical ionic solid like sodium chloride, and its physical properties: melting point, boiling point, brittleness, solubility and electrical behavior.
NaCl Lattice Connections to: A Framework for K-12 Science Education Practices, Crosscutting Concepts, and Core Ideas
Science Education Product
California Proposition 65
$82 (NACL-03) On back order until late summer.
Demonstrate how salt cleaves off in planes by seperating layers with a twist of your wrists.
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