Elements and Mixtures

4. the average atomic _________ comes from the protons + neutrons
6. a substance made of two or more elements chemically joined
7. a substance made of one kind of atom
10. a mixture that is not mixed evenly throughout
14. Elements in the same row across the table are in the same ______
15. one substance is dissolved in another
16. negatively charged particles inside an atom in the cloud
17. the smallest unit of an element that still has the properties of that element
19. atoms are arranged in the periodic table by the _________
20. along the zig zag line are ___________.
22. particles will settle our if not shaken or stirred
23. liquids that have a pH equal to 7

1. positively charged particles inside an atom
2. Elements in a group have similar properties and are sometimes referred to as ______
3. a mixture that is mixed evenly throughout
5. to the left of the zig zag line are __________.
8. particles inside an atom with no charge
9. Elements are arranged in a chart called the ________ table
11. Elements in the same column up and down are in the same _____
12. liquids that have a pH greater than 7
13. elements and compounds are pure ____________
17. liquids that have a pH less than 7
18. most of the elements are _____________.
21. a substance that contains a variety of elements and compounds that are not chemically combined.