Chemistry crossword

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Across
  1. 4. A regular arrangement of particles
  2. 6. Bond formed between ions of opposite charge
  3. 7. The particles with a charge of 1 – and almost no mass in an atom
  4. 8. Molecules containing 2 atoms joined by a covalent bond
  5. 9. Not part of the desired chemical composition
  6. 11. Another name for positive ion
  7. 13. A unit of two or more atoms held in together covalent bonds
  8. 17. A column of the Periodic Table containing element with similar properties
  9. 19. Process in which particles mix by colliding randomly with each other and bouncing off
  10. 20. React with substances it comes into contact with
  11. 22. Can be bend or hammered into a shape
  12. 25. Can easily be drawn out into a wire
  13. 26. A substance in which two or more elements are chemically combined
  14. 28. Measure of how fast or slow something is
  15. 30. Halogens reacting with metals to form compounds
Down
  1. 1. A physical change from a solid to liquid
  2. 2. Tells you how much of one substance is dissolved in another substance
  3. 3. Another name for negative ion
  4. 5. Soluble bases; Hydroxides
  5. 10. Atoms of the same element, that have a different numbers of neutron
  6. 12. The center part of an atom, made up of protons and neutrons
  7. 14. A compound formed between oxygen and other element
  8. 15. There is only one substance in it
  9. 16. A chemical made in a chemical reaction
  10. 18. The liquid in which a solute is dissolved to make a solution
  11. 21. A starting chemical for a reaction
  12. 23. A solution of a slightly soluble compound calcium hydroxide
  13. 24. Makes a ringing sound when struck
  14. 27. The mass of a substance per unit volume
  15. 29. A substance containing only one type of atom; it cannot be broken