Across
- 6. element that belongs to Group 3A and Period 2
- 8. Sanskrit word that means "first"
- 9. elements found in the shorter columns of the periodic table aka B groups
- 10. particles found in the nucleus aside from neutrons
- 12. classification of elements that exhibit properties of both metals and nonmetals
- 14. elements found in the longer columns of the periodic table aka A groups
- 16. first element in Group 5A
- 19. horizontal arrangement of elements in the periodic table
- 20. another term for the horizontal arrangement of elements in the periodic table
Down
- 1. collective name for the elements in Group 7A
- 2. classification of elements that tend to form cations
- 3. number of electrons in the outermost shell of a carbon atom
- 4. vertical arrangements of elements in the periodic table
- 5. first element in the periodic table
- 7. Russian chemist who proposed the arrangement of elements based on increasing atomic masses
- 10. word that describes the repeating patterns of physical and chemical properties of elements
- 11. collective name for the elements with atomic numbers 58 to 71
- 13. an atom or group of atoms that has a net positive or negative charge
- 15. English chemist who proposed the law of octaves
- 17. first word of the collective name for the elements in Group 8A
- 18. term used for the electrons in the outermost shell of an atom