Across
- 5. Who arranged the periodic table by atomic number
- 7. Elements that loses electrons
- 10. Salt
- 12. A reaction that means to break apart
- 14. The amount of reactants has to be equal to the amount of
- 15. A noble gas that does not have a valency of 8
- 17. What must be added to balance an equation
Down
- 1. Most reactive element in the periodic table
- 2. We balance an equation to follow the law of conservation of
- 3. A reaction that produces H2O and CO2
- 4. Must never be changed to balance an equation
- 6. The first element in the periodic table
- 8. Has a PH less than 7
- 9. Mainly found in stars
- 11. total number of protons in an atom
- 13. The most common element in the Earth’s crust
- 16. The only metal on Earth that is liquid at room temperature
- 18. The most active elements of the Halogens
- 19. Substance that speeds up the reaction but is not used up in the reaction