Across
- 2. synthesis always forms solids
- 3. Most reactive nonmetals
- 4. elements tend to be stable with eight valence electrons
- 7. Conduct electricity and heat
- 8. ion with a negative charge e- are gained
- 11. used in a balanced chemical equation
- 13. Columns on the periodic table
- 15. most comment element in the universe
- 16. ion with a positive charge e- are lost
- 17. allows us to change/convert between two units
- 18. atom or molecule that has a charge becasue it has gained or lost electrons
- 19. Rows on the periodic table
- 21. Very reactive
- 22. subatomic particles that have a negative charge
Down
- 1. electrons are shared
- 5. another name for percent yield
- 6. the smallest particle thats made up of matter
- 9. is a unit of concentration for solutions that is frequently used in chemistry
- 10. shows only the substances that undergo a change
- 12. 1/12 the mass of a carbon-12 isotope
- 14. properties of elements repeat as a result of being ordered by atomic number
- 20. an atom with the same number of protons but a different number of neutrons