Across
- 7. Metals in Group 1 of the Periodic Table that produce alkalis when they react with water.
- 8. a large molecule, for example a protein
- 10. The elements found in Group 7 of the Periodic Table.
- 13. link formed between two or more ions to form a compound.
Down
- 1. particles that are formed when atoms are bonded together with covalent bonds.
- 2. forces of attraction or repulsion which act between neighboring particles (atoms, molecules or ions)
- 3. ways in which elements are joined together to form compounds
- 4. The elements found in Group 8 of the Periodic Table.
- 5. a soft, dark grey form of carbon, used in the middle of pencils, as a lubricant in machines, and in some nuclear reactors
- 6. the link form when atoms share electrons to form a molecule.
- 9. ordered array of points describing the arrangement of particles that form a crystal. The unit cell of a crystal is defined by the lattice points.
- 11. a compound formed when the ions of a metal and a non - metal react together.
- 12. An atom that has lost or gained one or more electrons and has an electric charge.