Across
- 2. Smallest unit of an element that maintains the properties of an element
- 4. Horizontal rows on the periodic table
- 7. A subatomic neutral particle in the nucleus
- 8. The number of protons and electrons in the nucleus
- 9. A chart of the elements arranged by their properties
- 10. pure substance that consists of one atom
Down
- 1. Total number of protons and neutrons in the nucleus
- 3. Able to be hammered into sheets
- 5. Negatively charged particle that moves in the nucleus
- 6. positively charged particle in the nucleus