Unit 6 Vocabulary

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Across
  1. 4. Elements usually having these common properties: shiny, good conductors of heat and electricity, are solid at room temperature. In the periodic table, metals are found at the left of the stair-step line.
  2. 7. A heterogeneous mixture containing tiny particles that never settle out; for example, gelatin and milk.
  3. 8. A negatively charged subatomic particle that is found in the space outside the nucleus of an atom
  4. 9. The changing of a substance from a gas to a liquid, which usually takes place when a gas is cooled to or below its boiling point.
  5. 13. Elements that usually are gases or brittle solids at room temperature; most do not conduct heat or electricity well. In the periodic table, nonmetals are found at the right of the stair-step line.
  6. 15. An electron that is in the highest occupied energy level of an atom
  7. 17. A state of matter in which materials have a definite shape and a definite volume
  8. 18. The process in which a solid changes directly to a vapor without becoming a gas.
  9. 20. Substance in which all the atoms in a sample are alike.
  10. 22. Atoms of a given element that have different numbers of neutrons and different mass numbers
Down
  1. 1. A heterogeneous mixture containing a liquid in which large particles evenly settle out.
  2. 2. A neutral subatomic particle that is found in the nucleus of an atom
  3. 3. The smallest particle of an element; consists of protons, neutrons and electrons
  4. 5. Substance made of the combined atoms of two or more elements.
  5. 6. A visual model of the most likely locations for the electrons in an atom
  6. 10. A state of matter in which a material has neither a definite shape nor a definite volume
  7. 11. Elements having the properties of both metals and nonmetals. In the periodic table, metalloids are found along the stair-step line that separates metals from nonmetals.
  8. 12. Matter that always has exactly the same composition; an element or compound
  9. 14. A unique number for each element that equals the number of protons in an atom of that element
  10. 16. The sum of the protons and neutrons in the nucleus of an atom
  11. 19. A positively charged subatomic particle that is found in the nucleus of an atom
  12. 21. A state of matter in which a material has a definite volume but not a definite shape