Chapter 4

1. anything that has mass and takes up space
4. matter made of only one kind of atom
6. atoms of the same element that have different numbers of neutrons
7. positively charged particles in the nucleus
8. particles that are negatively charged
10. central part of the atom
12. different in kind, unline
13. have a shiny or metallic luster
16. states that matter is not created or destroyed, it only changes form
19. a substance whose smallest unit is made up of atoms of more than one element bonded together
20. number the number of protons plus the number of neutrons

1. two or more substances that come together but do not combine to make a new substance
2. comes from the nucleus and has no charge
3. a table where the chemical elements are arranged in related groups
5. the same throughout
9. matter that has the same composition and properties throughout
11. a spherical cloud of varying density surrounding the nucleus
14. a scientist who used symbols to represent elements on a table
15. a small particle that makes up most types of matter
17. elements that are dull in appearance
18. elements that have characteristics of metals and nonmetals