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