chemistry crossword

3. characteristics that describe a particular substance e.g color,lustre,density
5. an element that has both metallic and non-metallic properties
6. workplace hazardous materials information system
7. the number of protons in a nucleus of one atom of an element
10. the smallest part of an element; a neutral particle made up of a nucleus containing protons and neutrons and in which the number of electrons equal the number of protons
11. mass cannot be created or destroyed in a chemical reaction
16. change in the appearance or state of a substance that does not change the composition
18. a chemical reaction that releases energy
20. a shiny, malleable and ductile element that conducts electricity
21. a neutral particle in the nucleus of an atom
23. negatively charged particle that orbits the nucleus of an atom

1. an experiment in which one or more of the products of a chemical reaction can escape
2. anything that has mass and takes up space
3. a table in which the elements are organized by their physical and chemical
4. substance that reacts with another substance or substances in a chemical reaction to create a new substance with different properties
5. a pure substance formed when at least two non-metals combine
8. mass of one atom of an element calculated from the total number of protons, neutrons and electrons
9. positively charged particle in the nucleus of an atom
12. a change that results when two or more substances react to create a new substance with different properties
13. a dull, brittle element that does not conduct electricity
14. a chemical reaction that absorbs energy
15. a pure substance formed when at least one non-metal and one metal combine
17. an experiment in which all products and reactants of a chemical reaction are accounted for
19. a chemical combination of two or more elements in a specific ratio
22. a new substance produced in a chemical reaction between reactants