Physical Science Vocabulary- 1st Semester

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Across
  1. 1. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mas
  2. 4. a multiplier or factor that measures some property
  3. 6. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
  4. 7. a positively charged ion
  5. 9. an element whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors
  6. 11. a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
  7. 14. a particle smaller than an atom
  8. 17. a change that does not affect the identity ofriation does not depend on that the substance
  9. 18. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
  10. 20. elements share electrons
  11. 21. the energy stored in the bonds of a compound
  12. 23. parts of mixture look the same
  13. 26. ion with more than one atom, has a charge, acts like a single unit
  14. 29. an if then statement that can be proven
  15. 31. 2 compounds form 2 new compounds
  16. 33. an answer/belief having a sound basis in logic or fact; reasonable or cogent.
  17. 38. variable whose value depends on that of another
  18. 39. how compact an object is
  19. 41. can be observed without changing the substance
  20. 44. describes how a substance changes into a new substance
  21. 45. hydrocarbon and oxygen form water and carbon dioxide
  22. 47. regions of space around the nucleus of an atom where an electron is likely to be found
  23. 48. 1 compound form 2 or more elements
  24. 49. a chemical equation that has an equal number of atoms on both sides of the arrow
  25. 50. chemical change that produces a new substance
  26. 54. simplest form of a substance
  27. 55. releases energy in the form of heat
  28. 56. the substance before the change
  29. 58. makes a reaction go faster, but is not used up
Down
  1. 2. two more atoms chemically combined
  2. 3. an attribute, quality, or characteristic of somethin
  3. 5. the attractive force that holds atoms or ions together
  4. 8. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties
  5. 10. the substance after the change
  6. 12. an element, feature, or factor that is liable to vary or change
  7. 13. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  8. 14. 1 element and 1 compound form are new element and a new compound
  9. 15. two or more atoms physically combined
  10. 16. same ratio of atoms no matter the size of this substance
  11. 19. the total number of protons and neutrons in a nucleus
  12. 22. absorbs energy in the form of heat
  13. 24. a set of elements occupying a column in the periodic table and having broadly similar properties arising from their similar electronic structure.
  14. 25. the mass of an atom of a chemical element expressed in atomic mass units
  15. 27. 2 elements form a compound
  16. 28. the symbolic representation of a chemical reaction in the form of symbols and formulae
  17. 30. a set of elements occupying an entire horizontal row in the periodic table.
  18. 32. a set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound
  19. 34. variable whose variation does not depend on that of another
  20. 35. parts of mixture look different/distinguishable
  21. 36. a change that creates a new substance
  22. 37. something in an experiment that stays the same
  23. 40. 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
  24. 42. a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
  25. 43. elements transfer electrons
  26. 46. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
  27. 50. a group or individual used as a standard of comparison for checking the results of a survey or experiment.
  28. 51. simplest form of a substance
  29. 52. an element or substance that is not a metal.
  30. 53. all atoms want 8 valence electrons like the noble gases
  31. 54. a negatively charged ion
  32. 57. an experiment/test of a hypothesis