Across
- 4. ribonucleic acid
- 6. carries genetic information
- 8. encases the cytoplasm
- 10. only on plant cells
- 12. first row on the periodic table
- 15. conducts electricity and heat
- 16. columns on the periodic table
- 17. a cloud that contains negative particles
- 18. inert gas
- 19. holds protons and neutrons
- 20. holds components of the cell
- 21. packages proteins and lipid molecules
- 23. negative
- 24. powerhouse of the cell
Down
- 1. aren't metals or nonmetals
- 2. positive
- 3. doesn't conduct electricity and heat
- 5. building block of life
- 7. contains RNA and proteins
- 8. brain of the cell
- 9. electron in the outermost shell
- 11. neutral
- 13. second row in the periodic table
- 14. Deoxyribonucleic acid
- 22. rows on the periodic table