Chapter 2: Properties of Materials

123456789
Across
  1. 4. The layers or shells of electrons are referred to as being at different energy levels.
  2. 5. The arrangement of electrons in the shells or levels around the nucleus of an atom.
  3. 6. The elements found in Group 7 of the Periodic Table.
  4. 7. A table of all the elements placed in order of their atomic number.
  5. 9. The elements found in Group 8 of the Periodic Table.
Down
  1. 1. Forces of attraction between particles with opposite electrical charges.
  2. 2. Metals in Group 1 of the Periodic Table that produce alkalis when they react with water.
  3. 3. The layers of electrons arranged around the nucleus of an atom.
  4. 8. The number of protons in an atom; each type of atom has a unique atomic number.