| Question | Answer |
| 1. positively charged particle in the nucleus of an atom | proton |
| 2. region surrounding an atoms nucleus where one or more electrons are often found | electron cloud |
| 3. negatively charged particle that occupies the space in an atom outside the nucleus | electron |
| 4. one or more atoms of an element having the same number of protons but a different number of neutrons | isotope |
| 5. region at the center of an atom that contains most of the mass of an atom | nucleus |
| 6. an atom that has a charge because it has gained or lost electrons | ion |
| 7. the number of protons in the nucleus of an atom of an element | atomic number |
| 8. uncharged particle in the nucleus of an atom | neutron |
| 9. the nucleus of an atom contains __________ and neutrons | protons |
| 10. the nucleus has a _______________ and the ___________ of the atom | positive charge; most mass |
| 11. an electron is a _____________ particle located outside the nucleus | negatively charged |
| 12. the modern model of an atom is called the ____________ model | electron cloud |
| 13. electrons that are close to the nucleus have ____________ than electrons that are farther from the nucleus | more energy |
| 14. the atomic number is the number of ____________ in the nucleus of an atom of an element | protons |
| 15. isotopes have the same number of protons but different numbers of __________ | neutrons |
| 16. an ion has a charge because it has gained or lost ___________ | electrons |
| 17. a ___________ ion has more protons than electrons | positive |
| 18. adding a ____________ to a neutral atom produces a new element | proton |
| 19. antonym:
part | whole |
| 20. antonym:
substance | mixture |
| 21.antonym:
positive | negative |
| 22.antonym:
proton | electron |
| 23.antonym:
heterogeneous | homogeneous |
| 24. antonym:
individual | multiple |
| 25.antonym:
solvent | solute |
| 26.antonym:
element | compound |
| 27.antonym:
bond | detach |
| 28. which particle in an atom has a positive charge | proton |
| 29. which particle in an atom has no charge | neutron |
| 30. which particle in an atom has a negative charge | electron |
| 31. where is most of the mass of an atom found | nucleus |
| 32. a mixture in which two or more substances are evenly mixed but not bonded together | homogeneous mixture |
| 33. anything that has mass and takes up space | matter |
| 34. substance made of only one kind of atom | element |
| 35. a small particle that is the building block of matter | atom |
| 36. substance made of two or more elements that are chemically joined in a specific combination | compound |
| 37. a mixture in which the substances are not evenly mixed | heterogeneous mixture |
| 38. two or more atoms that are held together by chemical bonds and act as a unit | molecule |
| 39. matter with a composition that is always the same | substance |
| 40.true or false:
gravity "is" matter because it does not have mass and volume | false; isn't |
| 41. true or false:
each type of "atom" has a different number of smaller particles | true |
| 42. true or false:
the "composition" of a substance is always the same | true |
| 43. true or false:
the substances in a mixture "are" bonded together | false; are not |
| 44. true of false:
all atoms of an "element" are alike | true |
| 45. true or false:
the atoms in a "molecule" are held together by chemical bonds | true |
| 46. true or false:
"elements" can be classified as metals, nonmetals, and metalloids | true |
| 47. true or false:
compounds are made of atoms of "the same element" bonded together | false; different elements |
| 48. true or false:
soda is an example of a "heterogeneous" mixture, or a mixture in which two or more substances are evenly mixed but not bonded together | false; homogeneous |
| 49. HE or HO
granite | HE |
| 50. HE or HO
smoke | HE |
| 51. HE or HO
soda | HO |
| 52. HE or HO
brass | HO |
| 53. HE or HO
trail mix | HE |
| 54. HE or HO
air | HO |
| 55. HE or HO
tap water | HO |
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