Across
- 3. a chemical bond in which two atoms share a pair of valence electrons
- 4. a diagram of an atom, ion or molecule in which each dot represents a valence electron
- 6. notation that shows what elements a compound contains and the ratio of the atoms or ions of these elements in the compound
- 7. the energy stored in chemical bonds
- 8. a neutral group of atoms that are joined together by one or more covalent bond
- 10. an atom or group of atoms that has a positive or negative charge
- 11. a substance that undergoes change in a chemical reaction
- 12. the force that holds cations and anions together
Down
- 1. a mixture of two or more elements at least one of which is a metal that has the characteristics properties of a metal
- 2. a representation of a chemical reaction in which the reactants and products are expressed as formulas
- 3. the force that holds atoms or ions together as a unit
- 5. new substances formed as a result of a chemical reaction
- 9. the attraction between a metal cation and the shared electrons that surround it