Across
- 6. 118 elements are organizing into this
- 7. a substance that reacts whit other substances in a chemical reaction
- 9. chemical combination
- 15. a chemical reaction which absorbs heat energy
- 17. an experiment in which all reactants and all products of a chemical reaction are accounted for
- 19. pure substance formed by the combination of metal and a non-metal
- 20. two or more substances in which you can see each substance easily
- 21. an experiment in which one or more production of a chemical reaction can escape
- 22. subatomic particle with a positive electrical charge
- 25. one type of matter
Down
- 1. a new substance produced in a chemical reaction
- 2. subatomic particle with a negative electrical charge
- 3. a change in state or apprentice
- 4. anything on the periodic table
- 5. subatomic particle with no charge
- 8. average mass of an element
- 10. made when you mix substances together
- 11. number of protons an element has
- 12. when two or more substance react to form a new substance
- 13. a combination of symbols that represent a compound and the amount
- 14. in a chemical reaction the total mass of the reactants is equal to the total mass of the porducts
- 16. one or more letters that represent on element
- 18. pure substance formed by the combination of two non-metals
- 23. a chemical change which releases heat energy
- 24. two or more substances that look like one substance