revision_bonding properties

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Across
  1. 3. the amount of stress a material can withstand before breaking
  2. 7. Sodium ______Na2CO3 is domestically well known for its everyday use as a water softener .
  3. 9. Halogens are generally used as _______for drinking water, swimming pools, fresh wounds, dishes, and surfaces. They kill bacteria and other potentially harmful microorganisms.
  4. 11. the science that examines the arrangement of atoms in solids
  5. 13. The vertical columns of elements with similar properties in Periodic table.
  6. 14. the ability of a substance to be hammered into sheets.
  7. 16. The main ingredient of glass is always _____ dioxide
Down
  1. 1. the ability of a material to return to their original shape after stretching.
  2. 2. The horizontal rows in Periodic table.
  3. 4. the property that allows metals to be drawn into wires
  4. 5. a form of carbon that is bonded covalently and does conduct electricity
  5. 6. The most reactive non-metals
  6. 8. This is a measure of the strength and rigidity of the bonding in a structure.
  7. 10. this halogen is used in teflon (non-stick pans)
  8. 12. this halogen is used in PVC
  9. 13. زجاج
  10. 15. ______ crystals are hard but much more brittle than metallic crystals.