Unit 2 Matter

3. small dense center of an atom.
7. the amount of mass in a given volume.
11. elements that are shiny and conduct heat and electricity well.
12. made up of one or more of the same kind of atom.
15. vertical columns on periodic table.
18. contains a variety of elements and compounds not chemically combined.
19. anything that has mass and takes up space.
20. the amount of matter in an object.
22. when a liguid becomes a gas throughout.
24. when a gas becomes a solid.
26. elements that have some properties of metals and nonmetals.
27. poor conductors of heat and electricity.
30. describes a substances ability to change into a new substance with different properties.
33. when liquid surface layer becomes a gas.

1. substance with no definite shape or volume.
2. horizontal rows on periodic tabel.
4. substance with a definite volume but no definite shape.
5. a characteristic of a substance that can be observed without changing its identity.
6. mixture without uniform composition.
8. particles with no charge.
9. a measure of the gravitational force on an object.
10. where elements are arranged in order of increasing atomic mass.
13. number of protons in the nucleus of an atom.
14. mixture with uniform composition.
16. when a solid becomes a gas.
17. smallest unit of an element that retains the properties of that element.
20. total number of neutrons and protons in an atoms nucleus.
21. the amount of space an object takes up.
23. occurs when one or more substances change into an entirely new substance.
25. refers to items that contain carbon and hydrogen.
28. substance with a definite shape and volume.
29. made up of different kinds of atoms.
31. positively charged particles.
32. negatively charged particles.