Science Term 2- Atoms and their Reactions

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Across
  1. 3. General term used to describe any atoms that are connected by chemical bonds
  2. 5. The mass of the whole atom measured by protons and neutrons
  3. 8. A reaction in which a compound is broken down into single elements or smaller compounds
  4. 10. A pair of atoms with shared electrons
  5. 11. A molecule made up of two or more different types of elements
  6. 12. A reaction in which single elements or small compounds react to form a larger compound
  7. 13. An exothermic chemical reaction producing oxides
Down
  1. 1. Electrons on the outermost shell of an atom
  2. 2. The word used to describe how strong a pull an atom has on another atom, measured on a scale of 0.4 to 0.7
  3. 4. Horizontal rows on the periodic table
  4. 6. Reacts with a base to form a salt and water
  5. 7. Vertical columns on the periodic table
  6. 9. Can kill 10 000 000 people if ingested