Across
- 3. 3 quarks, one up quark, and 2 down quarks and many many "intermediate particles" called gluons
- 5. are called PERIODS and the columns are called GROUPS.
- 8. protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 10. chemical element with symbol O and atomic number 8.
- 11. basic unit of a chemical element.
- 12. a substance made from two or more different elements that have been chemically joined.
- 13. type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Down
- 1. of elements
- 2. a column in the periodic table of the chemical elements.
- 4. A small particle with a negative charge that is found in all atoms.
- 6. substance made of only 1 type of atom that can not be broken down further into other substances.
- 7. the interior of the cell from the outside environment.
- 9. a subatomic particle with a positive electric charge.