Chemisty Crossword

3. mass of atom
4. group of atoms joined by covalent bonds
5. an experiment in which one or more products of a chemical reaction can escape
9. combination of pure substances; unlike a compound, the components of a mixture do not combine chemically and are not always in the same ratio
11. a system of easy to see warning symbols on hazardous materials
12. cloudy mixture in which tiny particles of one substance are held within another, and the particles can be separated out
13. number of protons in the nucleus of one atom of an element
16. substance that reacts with another substance or substances in a chemical reaction to create new substance with different properties
19. a table in which the elements are organised by their physical and chemical change
20. pure substance formed when nonmetals combine
22. an atom that has become electrically charged because it lost or gained electrons
25. orbit of electrons around the nucleus of an atom

1. new substance produced in a chemical reaction between reactants
2. an experiment in which all reactants and all products of a chemical reaction are accounted for
6. substance made of only one kind of matter, which has unique set of properties
7. amount of mass in a given volume
8. reaction that takes place when two or more substances react to for a new substance
10. The smallest part of an element that is representative of that element
14. chemical reaction that releases energy
15. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from the other substance
17. invisible negatively charged particle that orbits the nucleus of an atom
18. heterogeneous mixture; mixture in which the different substances that make up the mixture as visible
21. change that results when two or more substance react to create a different substance
23. the most reactive non-metals
24. homogeneous mixture; mixture of two or more pure substances that looks like one substance