Across
- 2. - Vertical columns on the periodic table (6)
- 4. - Dense central part of an atom (7)
- 8. - Scientist who arranged the Periodic Table by atomic mass (10)
- 10. - The law that mass is neither created nor destroyed (12)
- 12. - The type of radiation that has no charge and no mass (5, 4)
- 13. - Lens that is closest to the specimen (8, 4)
- 14. - Type of cell division that produces gametes (7)
- 16. - Smallest particle of an element that retains its properties (4)
- 18. - Horizontal rows on the periodic table (7)
- 20. - The group name for elements that are inert or unreactive (5, 5)
- 22. - Type of bond formed by sharing electrons (8)
- 23. - The average distance from nucleus to electron (6, 5)
- 24. - Positively charged subatomic particle (7)
Down
- 1. - Number of protons in the nucleus (6, 6)
- 3. - Process where a solid turns directly into a gas (11)
- 5. - Liquid that fills the space inside a cell (7)
- 6. - The distance between two peaks of a wave (9)
- 7. - The relative mass of a proton (4)
- 9. - Substances that cannot be broken down chemically (8)
- 11. - Subatomic particles with a negative charge (9)
- 15. - Outer part of an atom where electrons are found (8, 5)
- 17. - Change of state from gas to liquid (12)
- 19. - Type of microscope that uses beams of electrons (8)
- 21. - The process by which body cells divide for growth or repair (7)