Crossword Puzzle Chemistry

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Across
  1. 3. atomic particle with no charge
  2. 5. atomic particle with a negative charge
  3. 7. center of an atom with neutrons and protons
  4. 8. a metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well
  5. 10. formed between two or more atoms by the transfer of one or more electrons between atoms
  6. 11. a substance that flows freely but is of constant volume
  7. 12. a negativily charged ion
  8. 16. a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero
  9. 17. a connection between two surfaces or objects that have been joined together, especially by means of an adhesive substance, heat, or pressure
  10. 19. a substance or matter in a state in which it will expand freely to fill the whole of a container
  11. 20. a chemical bond formed when electrons are shared between two atoms
Down
  1. 1. the electrons in the outermost shell, or energy level, of an atom
  2. 2. an element or substance that is not a metal
  3. 4. process of a solid transforming into a liquid
  4. 6. a positively charged ion
  5. 9. a covalent bond between two atoms where the electrons forming the bond are unequally distributed
  6. 13. atomic particle with a positive charge
  7. 14. a metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals
  8. 15. firm and stable in shape; not liquid or fluid.
  9. 18. a type of bond that occurs when two atoms share a pair of electrons with each other