chemistry 7

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Across
  1. 2. a reaction that takes I compound and breaks it down to its elements AB A + B
  2. 4. A reaction that uses oxygen and gives off heat and light
  3. 5. the number of protons + number of neutrons. The unit we use is AMUs which is the mass of I proton.
  4. 6. of an element is the Atomic mass but in grams not AMU's
  5. 8. - the number of protons in an atom
  6. 11. Sum of the molar masses of all the atoms in a Compound,
  7. 12. - a reaction where a compound and and elemes element react to form a new compound and element AB + C → AC+B
Down
  1. 1. a reaction where 2 compounds go into a reaction and 2 different compounds come out. AB + CD → AD + CB
  2. 3. (formation) - a reaction where 2 or more elements combine to form 1 Compound A+B → AB
  3. 5. A number that when you multiply it lay the molar mass gives you the mass of I atom/molecule in grams 1.66 * 10 ^ - 24
  4. 7. combustion burning of a metal Creating a metal oxide A+ H₂O → AO+H2↑
  5. 9. Combustion-a reaction where Hydrogen Or Carbon based Compounds burn creating CO₂+ H₂O CH+O→ CO₂+ H₂O
  6. 10. - a number equal to 6.02 * 10 ^ 23 atoms/Molecules of a substance in a measure of AMU number in grams.