Chemistry- Atoms

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Across
  1. 4. When an atom bonds with other atoms, either the same type (O2) or a different type (H2O), it’s called a …..
  2. 5. … ..Number written at top - bigger / number of protons and neutrons
  3. 8. Row with atomic number increasing row number. Is equal to the number Electron shells in an element
  4. 9. used to separate an insoluble solid from a liquid. E.g.separating sand from a mixture of sand and water,
  5. 11. ………. Distillation is used to separate the different liquids from a mixture of liquids. It works because the different liquids have different boiling points.
  6. 13. Type of bond between metal + non-metals, electrons in outer shell lost from metal atoms, gained by non-metal atoms
  7. 14. Positive charged fired through this in experiment disproving plum pudding model
  8. 16. created when atoms of two different elements combine. Eg H2O - different but NOT O2 same
  9. 18. Discovered electrons have shells
  10. 19. have the same number of protons, but different numbers of neutrons/ have same atomic number and different mass numbers
  11. 21. contains atoms with the same atomic number.
  12. 23. smallest building block of life has nucleus electrons etc
  13. 24. Column with elements with similar properties
Down
  1. 1. Discovered the electron / plum pudfing model / ie atoms as spheres of positive charge with electrons dotted around in it like raisins
  2. 2. worked out atoms have planetary model with nucleus and orbiting electrons
  3. 3. Type of Bond between non-metal + non-metalPairs of electrons in outer shells shared
  4. 5. contains two or more different substances that are not chemically joined together. Eg smoothie
  5. 6. used to get solid crystals from a solution. When the solution is warmed, the solvent evaporates leaving crystals behind. Eg getting salt from a salt solution
  6. 7. …. Of mass - no mass is lost on gained in a chemical reaction
  7. 10. used to separate a solvent from a solution. Eg for getting water from sea water
  8. 12. ….. number written at bottom - smaller / equal to no. Of electrons / also equal to no. Of protons
  9. 15. Did gold foil experiment to disprove plum pudding model
  10. 17. Substances Containing only one type element or compound
  11. 20. Impure substances have boiling and melting points outside those of pure substances
  12. 22. Negatively charged particle in an atom