Chemistry

2. conductors of heat and electricity, malleable, ductile
7. two elements mixed together to create a new substance
9. the shells of an atom
10. metal, nonmetal, and metalloid _____
11. the letters that represent the element name
13. a cold reaction
16. row(s) of periodic table
17. a hot or heated reaction
19. not conductive, malleable, or ductile
20. share properties of metals and nonmetals
21. number of electrons in outer shell
23. all elements that go into reactions come out of the reaction with the same number

1. pure substance on the periodic table
3. number of protons and electrons
4. a full outer shell, far right side of periodic table
5. creator of the periodic table
6. carries a positive charge
8. negative charge and found in all atoms
12. a group of atoms
14. carries negative charge
15. located below the symbol on the periodic table, add up protons and electrons
16. the outcome of a chemical reaction
18. the start of a chemical reaction, what creates a product
22. even smaller than a molecule
24. the center of all molecules