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chapter 1 review

atoms and molecules

QuestionAnswer
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
Created by: hofmahai2753