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Across 2. the gain of electrons by atoms of a substance 6. an atom with the same number of protons but different numbers or neutrons 9. the heat content of a system at a constant pressure 12. Has an indefinite shape and volume 14. Observation, Hypothesis, Experiment, Conclusion, Theory, Law 17. Formula: error/accepted value x 100 18. The shortest distance between equivalent points on a continuous wave- measured from crest to crest or from trough to trough 21. The type of elements found in Group 1A 23. an insulated device used for measuring the amount of heat absorbed or released during a chemical or physical process 25. 0 charge-neutral 26. pH of more than 7 28. A + BX --> AX + B (type of replacement reaction) 29. pH of less than 7 30. substances formed during a chemical reaction 31. +1 charge 32. A + B--> AB is a _____________ Reaction

Down 1. Has a definite shape and volume 3. The force that hold two atoms together 4. the lowest allowable energy state of an atom 5. the starting substances in a chemical reaction 7. 6.626x10^-34 J 8. A solid produced during a chemical reaction in a substance 10. The type of elements found in Group 2A 11. Has an indefinite shape and a definite volume 13. 6.02x10^23 particles/mole 15. formed when two or more atoms bond covalently 16. -1 charge 19. Uses a porous barrier to separate a solid from a liquid 20. Group 4A: The________ Group 22. elements with physical and chemical properties of both metals and non-metals 24. The number of moles of solute dissolved per liter of solvent 27. A pure substance that cannot be separated into simpler substances by physical or chemical means