Chemistry Vocabulary

3. Less than 7 on the pH scale
5. The substance that is doing the dissolving when making a solution
6. matter that has the same chemical composition through-
8. A process that separates materials based on the size of their particles
9. positively charged particle
11. a mixture in which substances are evenly distributed;
12. anything that takes up space and has mass
13. Smallest particle of an element
14. a pure substance that forms when two or more elements join chemically in a fixed proportion
16. an element that is a poor conductor of heat and electricity
17. an element that has properties of both metals and non-metal
18. The substance that is dissolved when making a solution.
20. matter made up of two or more substances that are not joined chemically
21. chemically unreactive

1. a change in a substance that does not involve a change in the identity of the substance
2. division of geologic time into which eras are subdivided
4. a change that occurs when one or more substances change into entirely new substances with different properties
7. an element in group 1 of the periodic table
10. and cannot be separated into its parts by physical
11. a mixture in which substances are not distributed evenly;
15. Measure of the amount of matter in a substance
19. examples: elements and compounds