Across
- 2. how many valence electrons a noble gas has
- 4. columns on the periodic table
- 5. this is how easily an atom loses an electron
- 9. the force that holds two atoms together
- 10. an atom that loses electrons
Down
- 1. there is a periodic repetition of chemical and physical properties of the elements when they are arranged by increasing atomic number
- 3. rows on the periodic table
- 6. this rule states that atoms tend to gain, lose, or share electrons in order to acquire eight valence electrons
- 7. this structure can be used to illustrate the formation of chemical bonds
- 8. an atom that gains electrons