Chemistry Crossword

5. Slow chemical change that occurs when oxygen in the air reacts with a metal
6. When two or more substances react to form a new substance
7. A table in which the elements are organized by their physical and chemical properties
9. Change in the appearance or state that does not change the composition
11. An atom or group of atoms that has become electrically charged because it has lost or gained electrons
12. Pure substance formed when when two or more non-metals combine
13. Mixture in which the different substances that make up the mixture are visible
16. An experiment in which all reactants and all products of a chemical reaction are accounted for
18. Neutral particle in the nucleus of an atom
20. New substance produced in a chemical reaction between reactants
21. Workplace Hazardous Materials Information System
22. Pure substances that can not be broken down into other substances
23. Mass of one atom of an element calculated from the total number of protons, neutrons and electrons of an atom.
24. Anything that has mass and occupies space

1. Substance made up of only one type of matter, which has a unique set of properties
2. Substances that reacts with another substance or substances in a chemical reaction to create new substances with different properties
3. Pure substance formed when at least one metal and non-metal combine
4. In a chemical reaction, the total mass of the reactants is always equal to the total mass of the products
8. Invisible negatively charged particle that orbits the nucleus of an atom
9. Positively charged particle in the nucleus of an atom
10. Mixture of two or more substances that looks like one substance
14. Number of protons in the nucleus of one atom of an element
15. Chemical reaction that absorbs energy
17. Chemical reaction that releases energy
19. Positively charged center of an atom that contains protons and neutrons