Atoms, Elements, and the Periodic Table

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Across
  1. 2. a very small particle that makes up most kinds of smaller parts called protons, neutrons and electrons
  2. 4. a combination of compounds and elements that has not formed a new substance
  3. 6. positively charged located in the nucleus of an atom and that is counted to identify the atomic number
  4. 8. the columns on the table
  5. 9. elements that have characteristics of metals and nonmetals
  6. 12. two or more atoms of the same element that have different numbers of neutrons
  7. 14. of conservation of matter which states that matter is not created or destroyed-it only changes form
  8. 16. elements that are usually dull in appearance
Down
  1. 1. anything that has mass and takes up space
  2. 3. they have a shiny or metallic luster and are good conductors
  3. 5. made of only one kind of atom
  4. 6. the rows on the table
  5. 7. is a pure substance whose smallest unit is made of more than one element
  6. 10. invisible negatively charged particle
  7. 11. matter that has the same composition and properties throughout
  8. 13. number sum of the number of protons and neutrons in the nucleus of an atom
  9. 15. table is a table that arranges the elements
  10. 17. an uncharged particle located in the nucleus of an atom
  11. 18. mass the number of protons plus the number of neutrons