chemistry

1234567891011
Across
  1. 5. The group that contains silicone and boron.
  2. 6. The smallest particle of a chemical element that can exist.
  3. 8. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  4. 10. The first element on the periodic table
  5. 11. A thing that is composed of two or more separate elements; a mixture.
Down
  1. 1. The first alkali metal
  2. 2. A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
  3. 3. The arrangement of and relations between the parts or elements of something complex.
  4. 4. The compound that is made up of 2 hydrogen atoms and 1 oxygen atom
  5. 7. A species of atom having the same number of protons in its atomic nuclei.
  6. 9. The element that has eight protons