Unit 4/5 Vocab

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Across
  1. 3. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  2. 5. the mass in grams of one mole of a substance
  3. 7. as their name suggests, semiconductors are able to conduct heat and electricity under certain conditions
  4. 8. an atom or molecule that has gained or lost one or more electrons and has a negative or positive charge
  5. 9. the sum of the numbers of protons and neutrons in the nucleus of an atom
  6. 12. one of the elements of Group 2 of the periodic table
  7. 13. one of the metals that can use the inner shell before using the outer shell to bond
  8. 17. one of the elements of Group 17 of the periodic table
  9. 18. an element that is shiny and that conducts heat and electricity well
Down
  1. 1. an atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass)
  2. 2. one of the elements of Group 18 of the periodic table
  3. 4. the SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms of carbon in exactly 12 g of carbon-12
  4. 6. the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element.
  5. 10. an electron that is found in the outermost shell of an atom and that determines the atom’s chemical properties
  6. 11. in chemistry, a horizontal row of elements in the periodic table
  7. 14. one of the elements of Group 1 of the periodic table
  8. 15. a vertical column of elements in the periodic table; elements in a group share chemical properties
  9. 16. an element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution