Reactivity

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Across
  1. 5. The outermost electrons in an atom that control how it reacts.
  2. 6. Substances that react quickly and sometimes violently (ex: sodium in water).
  3. 8. A rapid reaction with oxygen that releases heat and light.
  4. 9. Substances that react slowly or hardly at all (ex: gold does not rust).
  5. 10. The gas released when metals such as zinc react with acids.
  6. 11. Group 18 elements with full outer shells, very stable and nonreactive.
Down
  1. 1. How easily a substance undergoes a chemical reaction to form something new.
  2. 2. When certain metals react with acids, releasing hydrogen gas and heat.
  3. 3. Iron reacting with oxygen and water to form iron oxide.
  4. 4. The ability of a substance to burn in oxygen.
  5. 7. Group 17 nonmetals that are highly reactive because they need one electron.
  6. 8. The slow wearing away of metals by reactions with the environment (ex: rusting).