Across
- 2. substances that increase the rate of a chemical reaction without themselves becoming chemically changed or part of the product.
- 4. simple and outdated model of an atom.
- 5. elements that have the same number of protons and electrons but different number of neutrons.
- 6. average of the mass numbers of all the isotopes of an element.
- 8. energy directly involved in moving matter.
- 9. more modern model of an atomic structure.
- 10. energy in action.
- 12. combination of two or more atoms held together by chemical bonds.
- 14. substances in solutions that are in great amounts.
- 17. the study of the chemical composition and reactions of living matter.
- 19. containing protons and neutrons tightly bound together.
- 20. aka emulsions, heterogeneous mixtures, compositions are dissimilar in different areas of the mixture.
- 24. a chemical bond between atoms formed by the transfer of one or more electrons from one atom to the other.
- 27. stored energy.
- 28. bonds in larger molecules are broken giving smaller less complex molecules.
- 31. the capacity to do work, or to put matter into motion.
- 32. homogeneous mixtures of components that may be gases, liquids and solids.
- 35. a net negative charge.
- 37. bonds are both made and broken.
- 38. smaller particles are bonded together to form larger more complex molecules.
- 40. a substance that takes up hydrogen ions in detachable amounts, proton acceptors.
- 41. anything that occupies space and has a mass.
- 42. an ionic compound containing cations other than H+ and anions other than the hydroxyl ion.
- 43. the bond that holds together the combination of atoms with other atoms.
- 44. the atom that loses the electron.
- 45. atoms with 1 or 2 valence shell electrons.
- 46. shell that specifically indicates an atom’s outermost energy level containing the electrons that are chemically reactive.
- 47. the mixture has exactly the same composition or makeup throughout.
- 48. when acids and bases mix and they produce salt and water.
Down
- 1. substances composed of two or more components physically intermixed.
- 3. contains positive electrical charges.
- 5. compounds that lack carbon.
- 6. a substance that releases hydrogen ions in detachable amounts, proton donors.
- 7. results from the movement of charged particles.
- 11. two or more different kinds of atoms bind.
- 13. number of protons in an atom’s nucleus.
- 15. forms of energy stored in the bonds of chemical substances.
- 16. universal solvent.
- 18. identical particles that make up each element.
- 21. shared electrons occupy a single orbital common to both atoms.
- 22. isotopes of elements and their atoms that decompose spontaneously into more stable forms.
- 23. energy that travels in waves.
- 25. contains neutral electrical charges.
- 26. small atoms with 6 or 7 valence shell electrons.
- 29. substances in solutions that are present in smaller amounts.
- 30. heterogeneous mixtures with large visible solutes that tend to settle out.
- 33. a one or two letter chemical shorthand designated to each element
- 34. a net positive charge.
- 36. contains negative electrical charges.
- 39. the sum of the masses of its protons and neutrons.