Physical Science Module 17

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Across
  1. 2. an element that is a good conductor of heat and electricity and is usually a solid at room temperature
  2. 4. occurs because positively charged metallic ions are surrounded by a sea of electrons
  3. 5. an element that can conduct electricity under certain conditions
  4. 8. different forms of the same element that have different molecular structures
  5. 11. vertical column in the periodic table
  6. 13. element or compound that cannot be broken down into simpler compounds and still maintain its properties
  7. 15. a molecule consisting of two atoms of the same element in a covalent bond
Down
  1. 1. element that can form ionic and covalent bonds with other elements and can have the properties of both metals and nonmetals
  2. 3. one of the elements in Groups 3 through 12 on the periodic table
  3. 6. an element with more than 92 protons; many are synthetic and disintegrate quickly
  4. 7. the ability to be hammered or rolled into a sheet
  5. 9. an element in which the nucleus of the atom breaks down and gives off particles and energy
  6. 10. element that usually is a gas or brittle solid at room temperature
  7. 12. the ability to be stretched into a wire
  8. 14. the process by which a solid changes to a vapor without first forming a liquid