Across
- 2. Chemical equation correctly shows that no mass was created or destroyed during the reaction
- 6. bonds force of attraction that exists between atoms.
- 8. atom that has lost or gained an electron and therefore carries an electric charge
- 9. of mass Mass is never created or destroyed it just changes forms
Down
- 1. electrons the number of electrons on the outermost energy level of an atom
- 3. group of atoms that are joined together with covalent bonds chemical bond formed when atoms share electrons
- 4. The substances produced after a chemical reaction
- 5. The substances present before a chemical reaction
- 7. positive ion is an atom that has lost electrons, resulting in an overall positive charge