Chemistry Crossword

3. Description of a solid that can be stretched into a long wire
5. substance that reacts with another substance or substances in a chemical reaction to create new substances with different properties
10. Chemical combination of two or more elements in a specific ration
12. chemical reaction that releases heat/energy
13. description of a substance that can be pounded or rolled into sheets
14. change in the appearance or state of a substance that does not change the composition
18. neutral particle in the nucleus of an atom
19. Mass of one atom of an element calculated from the total number of protons, neutrons, and electrons of the atom; measured in atomic mass units
21. new substance produced in a chemical reaction between reactants
22. pure substance formed when non-metals combine
24. Group 1 Elements in the periodic table, not including hydrogen; the most reactive of the metals

1. pure substance that cannot be broken down into other substances
2. combination of pure substances
4. Slow chemical change that occurs when oxygen in the air reacts with a metal
6. group 18 elements in the periodic table; the most stable and unreactive elements
7. Stands for Atomic Mass Units
8. A reaction that takes place when two or more substances react to form new substances
9. Group 2 elements in the periodic table; their reactivity is not as strong as that of the alkali earth metals
10. Change that results when two or more substances react to create a different substance or substances; the new substances have completely different properties from the original ones
11. positively charged particle in the nucleus of an atom
15. Pure substance formed when at least one metal and one non-metal combine
16. Number of protons in the nucleus of one atom of an element
17. chemical reaction that absorbs heat/energy
20. Ability of a substance to conduct electricity or heat
23. Substance that helps a chemical reaction to proceed more quickly