Across
- 4. a substance made of two or more types of atoms
- 5. a substance made of one type of atom
- 6. when an atom gains electrons
- 7. atoms of the same types (same protons) have different mass numbers
- 11. the type of bond that forms between two metals
Down
- 1. changing states from a solid to a gas like in dry ice
- 2. the positively charged particle in an atom
- 3. the element with a atomic number of 1
- 4. the type of bond in which electrons are shared
- 7. the type of bond in which electrons are transferred
- 8. the negatively charged particle in an atom
- 9. when an atom loses electrons
- 10. model that explains how the electrons are in metal atoms bonded together