Across
- 2. energy the energy stored in chemical bonds
- 4. reaction a chemical reaction in which two or more substances react to form a single substance
- 5. a mixture of two or more elements, at least one of which is a metal, that has the characteristic properties of a metal
- 6. bond the force that holds cations and anions together
- 7. bond the attraction between a metal cation and the shared electrons that surround it
- 9. reaction a chemical reaction in which one element takes the place of another element in a compound
- 10. an ion with a positive charge
- 11. formula notation that shows what elements a compound contains and the ratio of the atoms or ions of these elements in the compound
- 14. dot diagram a diagram of an atom, ion or molecule in which each dot represents a valence electron
- 15. reaction a chemical reaction in which a compound breaks down into two or more simpler substances
- 17. new substances formed as a result of a chemical reaction
- 19. numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product
Down
- 1. reaction a chemical reaction in which two compounds exchange positive ions and form new compounds
- 3. bond the force that holds atoms or ions together as a unit
- 8. an atom or group of atoms that has a positive or negative charge
- 10. bond a chemical bond in which two atoms share a pair of valence electrons
- 12. a substance that undergoes change in a chemical reaction
- 13. an ion with a negative charge
- 16. a neutral group of atoms that are joined together by one or more covalent bonds
- 18. equation a representation of a chemical reaction in which the reactants and products are expressed as formulas