Chemistry Crossword

2. new substance produced in a chemical reaction between reactants
4. chemical reaction that releases heat
7. vertical column of elements in the periodic table
9. pure substance fromed when non-metals combine
11. horizontal row of elements in the periodic table
12. substance that reacts with another substance or substances in chemical reaction to create new substance with different properties
13. an experiment in which one or more products of a chemical reaction can escape
15. pure substance formed when at least one metal and non-metal combine
18. reactivity is not as strong as alkali metals
19. the most stable and unreactive elements
20. group of atoms joined by covalent bonds
21. shiny,malleable,ductile element that conducts electricity
22. dull,brittle element that does not conduct electricity

1. anything that has mass and occupies space
2. change in the appearance or state of a substance that does not change the composition
3. change that results when two or more substances react to create a different substance or substances
4. chemical reaction that absorbs heat
5. neutral particle in the nucleus of an atom
6. element that has both metallic and non-metallic properties
8. characteristic that describes a particular substance
10. a table with elements organized by their physical and chemical properties
14. the most reactive non-metals
16. an experiment in which all reactants and products of a chemical reaction are accounted for
17. positively charged particle in the nucleus of an atom
18. the most reactive of the metals