chemistry vocabulary

123456789101112131415161718192021
Across
  1. 3. a positively charged elementary that is a fundamental constituent of all atomic nuclei
  2. 4. a representation of a substance using symbols for its constituent elements
  3. 5. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
  4. 6. samples of a pure compound always contain the same elements
  5. 10. any element in group 2 of the periodic table
  6. 14. molecules composed only of two metals
  7. 18. an elementary particle that is a fundamental constituent of matter
  8. 20. any of the gases in group O (18) of the periodic table
  9. 21. the number of positive charges of protons in the nucleus of an atom of a given element
Down
  1. 1. theory that matter consists of of invisible particles called atoms
  2. 2. a table of chemical elements arranged in order of atomic number
  3. 7. any of the elements in group ia 1 of the periodic table
  4. 8. an element whose properties are intermediate between metals and solid non metals
  5. 9. any element in group 17 of the periodic table
  6. 11. any of the set of metallic elements in groups 4-12 of the periodic table
  7. 12. the integer number nearest in value to the atomic weight of an atom and equal to the number of nucleons
  8. 13. an ionic species having a negative charge
  9. 15. an ionic bond is a chemical link between two atoms caused by an electrostatic force
  10. 16. a positively charged ion
  11. 17. a fundamental group of atoms in a molecule serving as a base
  12. 19. any of two or more forms of a chemical element