Across
- 4. Chemical notation showing mass number and atomic number
- 8. Elements with properties of both metals and nonmetals
- 9. Electrons in the outermost energy level
- 11. Atoms of the same element with different numbers of neutrons
- 14. Negatively charged particle found outside the nucleus
- 16. Positively charged particle in the nucleus
- 19. Number of protons in an atom
- 20. Ability of a material to conduct electricity
- 22. Weighted average of an element’s isotopes
- 23. Elements that are typically shiny and conduct electricity well
Down
- 1. How easily an element reacts with other substances
- 2. Vertical column on the periodic table
- 3. Elements that are poor conductors and often gases
- 5. Metals found in Groups 3–12 of the periodic table
- 6. Average mass of an element’s isotopes
- 7. Soft, very reactive metals in Group 1
- 10. Dense center of the atom containing protons and neutrons
- 12. Region around the nucleus where electrons are likely found
- 13. Smallest unit of an element that retains its properties
- 15. Horizontal row on the periodic table
- 17. Total number of protons and neutrons in an atom
- 18. Neutral particle found in the nucleus
- 21. Specific region where electrons are found around the nucleus