Chemistry Crossword

2. vertical column in the periodic table
6. group 2 elements in the periodic table
11. an abbreviation for atomic mass
12. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
13. substance that reacts with another substance in a chemical reaction to create a new substance with different properties
14. neutral particle in the nucleus of an atom
16. the sum of the number of protons and neutrons in an atom
17. shiny, malleable, ductile element that conducts electricty
19. pure substance formed when a non-metals combine
22. pure substance formed when at least one metal and one non-metal combine
23. slow chemical change that occurs when oxygen in the air reacts with a metal
24. group 18 in the periodic table
25. element that has both metallic and nonmetallic properties

1. dull,brittle element that does not conduct electricity
3. chemical reaction that takes place in cells
4. an atom that has become electrically charged because it has lost or gained electrons
5. most reactive non-metals
7. chemical reaction that absorbs energy
8. chemical reaction that releases energy
9. invisible negatively charged particle that orbits the nucleus of an atom
10. the most reactive of the metals
15. new substance produced in a chemical reaction between reactants
18. positively charged particle in the nucleus of the atom
20. an experiment in which all reactants and all products of a chemical reaction are accounted for
21. horizontal row in the periodic table