Across
- 2. area around the nucleus of an atom where the atom’s electrons are most likely to be found
- 3. weighted-average mass of an element’s isotopes according to their natural abundance
- 5. electrically neutral particle inside the nucleus of an atom
- 6. Horizontal row in the periodic table,
- 9. organized list of all known elements tat are arranged by increasing atomic number and by changes in chemical and physical properties
- 13. sum of the number of protons and neutrons in an atom’s nucleus
- 14. particle in the nucleus with an electric charge of 1+
Down
- 1. number of protons in an atom’s nucleus
- 4. atom of an element that has a specific number of neutrons
- 5. the small, positively charged center of an atom, contains protons and neutrons
- 7. dot diagram uses the symbol for an element and dots representing the number of electrons in the element’s outer energy level
- 8. vertical column in the periodic table
- 10. particle with an electric charge of 1-, surrounds the nucleus of the atom
- 11. smallest particle of an element that still retains the properties of the element
- 12. particle of matter that makes up protons and neutrons