Across
- 2. the person who discovered the proton
- 3. an atom with a positive charge
- 6. tells how large an element is
- 8. a word that means a compound is dissolved in water
- 9. this person said that atoms combine in whole number ratios
- 11. involves a transfer of electrons
- 13. anions are formed by electrons being___
- 16. elements in group 2
- 18. an atom with a negative charge
- 19. atoms will gain or lose enough electrons to become isoelectronic with a noble gas
- 20. involves a sharing of electrons
Down
- 1. the person who gave the atom its name
- 4. indicates the smallest whole number ratio of positive to negative ions within an ionic compound
- 5. atomic mass is an average of the elements___
- 7. the elements in group 17
- 10. electrons are shared equally between two atoms
- 12. bonds where the electron are shared unequally between atoms
- 14. electrons are arranged in this around the nucleus
- 15. a way to show the number of valence electrons in an atom
- 17. the electrons in an atom's outermost shell is called___