Down 1. Electron in the last shell 4. Symbol used to show the valence electrons 5. Same electronic Configuration with the noble Bases 6. Energy used to remove valence electron 9 9. Behavior of nonmetals in covalent bonding Across 2.Behavior of most non-metals in ionic bonding 3. Ability of atoms to attract electrons 7. Rule which permits 8 electrons on last shell 8. Covalent compound use to sweeten coffee 9. Reasons why atoms give, accept and share electrons .​