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Across 2. Different molecules attraction 5. Two atoms result from sharing outer-shell electrons 7. Same number of protons, different number of neutrons 8. Measures Acidity of a Solution 9. Same hydrogen Bonds sticking together 11. Two Atoms with an unpaired electron 12. Subatomic particle with negative charge 13. A substand dissolve in a solution 15. Atom's attraction for shared electrons 16. Thermal Energy

Down 1. Making and Breaking of chemical bonds 3. Subatomic particle with positive charge 4. Attraction between slightly positve and negative atoms 6. No charge subatomic particle 10. Atoms that lose or gain one or more electrons 14. Decreases the hydrogen ion