Compounds & Chemicals Reactions

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Across
  1. 2. A chemical compound that changes its colour in presence of an acid or base.
  2. 4. A galvanic process by which metals deteriorate through oxidation
  3. 7. Any substance composed of identical molecules consisting of atoms of two or more chemical elements.
  4. 8. When cations and anions in aqueous solution combine to form an insoluble ionic
  5. 9. A substance that produces hydrogen (H+) ions when it is added to water.
  6. 10. A chemical bond that involves the sharing of electrons to form electron pairs between atoms.
  7. 11. Any substance that in water solution is slippery to the touch, tastes bitter, changes the colour of indicators
  8. 13. Two or more atoms connected by chemical bonds
  9. 15. Quantitative measure of the acidity or basicity of aqueous or other liquid solutions.
  10. 16. A chemical reaction between substances
  11. 17. Type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
  12. 18. Consists of a central nucleus that is surrounded by one or more negatively charged electrons.
  13. 19. S(s)+O2(g)→SO2(g)
Down
  1. 1. HCl + NaOH → NaCl + H2O.
  2. 3. CaCO3 (s) + heat → CaO (s) + CO2 (g)
  3. 5. A lasting attraction between atoms or ions that enables the formation of molecules, crystals, and other structures.
  4. 6. During an _____________, energy is constantly given off, often in the form of heat.
  5. 12. An ______________ releases heat, causing the temperature of the immediate surroundings to rise.
  6. 14. Occur when chemical bonds between atoms are formed or broken.