Chemistry Crossword

3. subparticles with no charge, found in the nucleus of the atom
7. the outer most shell
9. a group of highly reactive elements that are missing one electron in their outer orbit
11. a group of reactive elements with only 2 electrons in their outer orbit
12. atomic mass is measured in
13. the smallest particle of an element
14. an electrically charged atom
15. positive subparticles , found in the nucleus of the atom

1. the number of protons in each element/ the way the periodic table is sorted.
2. abbreviation (in English, Dutch, German or Latin) for each element consisting of one capital letter or one capital letter and a lowercase letter
4. a group of very stable and nonreactive elements
5. a group of highly reactive elements with only 1 electron in their outer shell
6. the mass of an average atom of an element
8. negatively charged subparticles that orbit around the nucleus of the atom
10. a pure substance made of only one kind of atom