Across
- 2. found in the atom neutral
- 4. The horizontal rows of the periodic table
- 8. The vertical rows of a periodic table
- 11. element Na
- 12. found outside of the element negatively charged
- 13. a substance made from two or more different elements that have been chemically joined.
- 14. central core of an atom
- 15. a pure substance, found a chart
Down
- 1. found in the atom positive
- 3. the arrangement of electrons around the nucleus of an atom
- 5. a chemical element and its compounds in the natural state
- 6. basic unit of a chemical element
- 7. matter is any substance that has mass and takes up space
- 9. where the electrons are found
- 10. the result of combining two or more substances