Across
- 2. is the measure of the gravitational force
- 4. the center of an atom
- 7. no electric charge
- 8. is the measure of the amount of mass in a given volume
- 9. contained a variety of elements and compounds
- 11. symbol is 2 or 1 letter that represents an element
- 14. is a pure substance- made up of only one atom
- 15. the basic building blocks of matter
- 16. negatively charged and much smaller that protons and neutrons
- 17. positive electric charge
Down
- 1. is a particular made up of one or more atoms that are joined together chemically
- 3. the amount of space the object takes up
- 5. properties a substance that can be observed and measured without changing the identity of the substance
- 6. number is the number of protons in the nucleus
- 10. mixture different thought the whole thing
- 11. is made up of the different kinds of atoms chemically combined
- 12. everything that has mass and takes up space
- 13. mixture is the same throughout the whole thing