Across
- 3. another word for homogeneous mixture
- 7. name for element found in group 17
- 8. mixture that does not look the same throughout
- 9. period 5 noble gas
- 11. sum of protons and neutrons
- 13. another name for column on periodic table
- 14. building block of matter
- 16. element that acts like metal and nonmetal
- 17. pure substance containing atoms of one element
- 19. another name for a row on periodic table
- 20. good conductor of heat and electricity. Left side of PT
- 21. particle that lives in the nucleus and has no charge
Down
- 1. pure substance containing atoms of different elements
- 2. contains atoms bonded together in fixed ratios. Composition does not change.
- 4. combo of pure substances that can have different composition
- 5. poor conductors located on right side of PT
- 6. chart that organizes elements
- 10. mixture that looks the same throughout
- 12. period 3 alkali metal
- 15. number that gives number of protons for an atom
- 16. has mas and takes up space
- 18. period 4 group 8 transition metal
- 19. particle in nucleus with positive charge