Across
- 2. the number of protons found in the nucleus of an atom, which uniquely identifies it element
- 3. a column in the periodic table of elements
- 5. the electrons in the outermost shell, or energy level, of an atom
- 6. members of a family of an element that all have the same number of protons but different numbers of neutrons
- 7. chemical element that exhibits some metal and some nonmetal properties
- 11. a chemical element is any substance that cannot be decomposed into simple substances by ordinary chemical processes
- 12. smallest unit into which matter can be divided without the release of electrically charged parts
- 14. a stable negatively charged component of an atom
Down
- 1. a structure model of an atom
- 4. the organized array of all the chemical elements in order of increasing atomic number
- 8. a subatomic particle with a mass of 1 and a charge of 0
- 9. combined mass of all protons, neutrons, and electrons that make up an atom
- 10. a column of elements on the periodic table each number of a family has the same number of valence electrons
- 13. positively charged particle that resides within the atomic nucleus