Across
- 1. a solution that resists changes in pH when acid or alkali is added to it.
- 5. (atomic __)letters that represent an element
- 7. (protein)spheroproteins
- 8. Basic unit of a chemical element.
- 9. Composed of 2 or more elements.
- 11. amino acid
- 12. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 14. electrical charge
- 19. the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- 22. a carbohydrate whose molecules consist of a number of sugar molecules bonded together.
- 23. particle with a negative charge
- 24. created in 1869
- 29. chemical reaction in which an acid and a base react quantitatively with each other.
- 31. the outermost shell of an atom containing the valence electrons.
- 32. Adenosine triphosphate
- 40. Energy form directly involved in putting the matter into motion.
- 43. a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
- 44. any of a class of sugars whose molecules contain two monosaccharide residues.
- 45. fibrous proteins
- 47. particle with a neutral charge
- 48. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
- 50. Carbon-containing compound.
- 51. a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
- 53. Positive subatomic particle.
Down
- 2. (protein) antibodies is an example of this
- 3. one of a class of substances that cannot be separated into simpler substances by chemical means.
- 4. Lack of carbon; compound.
- 6. include wax and oil; fatty acid
- 10. single sugar
- 13. (model) also known as Bohr’s atomic model
- 15. a radioactive isotope.
- 16. deoxyribonucleic acid
- 17. anything that has mass and takes up space
- 18. the ionized or ionizable constituents of a living cell, blood, or other organic matter.
- 20. a bond involving the sharing of electrons netween atoms
- 21. A bond that forms when electrons are transferred from one atom to another.
- 24. a measure of the hydorgen ion concentration of a solution
- 25. A reaction where 2 or more molecules or atoms combine to form a larger and more complex molecule.
- 26. form the basic structural unit of nucleic acids
- 27. a substance that accepts hydrogen ions
- 28. organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, and glucose.
- 30. a substance that liberates hydrogen ions when in an aqueous solution.
- 32. a region on an enzyme that binds to a protein or other substance during a reaction.
- 33. energy that travels by waves or particles
- 34. A reaction where bonds are broken.
- 35. a group of atoms bonded together
- 36. (reaction)process in which molecules are formed, changed, or broken down.
- 37. (atomic __) A number equal to the sum of all the neutrons and the protons in an atom's nucleus.
- 38. A reaction where bonds are broken and combined.
- 39. another term would be inert energy
- 41. (atomic __)atomic mass
- 42. a change from one state (solid or liquid or gas) to another without a change in chemical composition
- 46. ribonucleic acid
- 49. the energy of a body or a system with respect to the motion of the body or of the particles in the system.
- 52. (atomic __) the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.