Noris crossword puzzle

2. Electrons move in definite orbits or energy levels around the nucleus
4. Charged chemical species composed of two or more atoms covalently bonded or of a metal complex
6. A carbon based compound reacts with oxygen to form carbon dioxide and water
7. electrons that have been bonded by the highest energy level
9. when balancing equations you cannot change
12. the force that holds two atoms together
15. A single element reacts with a compound and displaces another element from the compound
16. Changed into a different substance or substances called products
17. when electrons are transferred from one atom to another
18. Liquid or gel that contains ions that can be decomposed
19. Positively charged ion
20. Chemical formulas in place of chemical names
21. Substance that is formed as the result of a chemical reaction
23. Two or more substances combine to form a single substance
24. bonding that involves electrons in the highest energy level

1. The exact temp at which solid will melt
3. Two compounds reach and exchange ions and form two new compounds
5. A compound of ions held together
8. Isolated system is neither created nor destroyed by the products chemical reactions
10. Give the number of molecules involved in that reaction
11. an atom that that carries positive or negative charges due to the result of having lost or gain one or more electrons
13. The sharing of electrons between atoms
14. A single compound breaks down into 2 or more simpler substances
22. states every atom wants 8 valence electrons
25. Negatively charged ion