Across
- 3. the smallest particle of matter, made of protons, neutrons and electrons
- 4. the part of the atom with a positive charge
- 8. positive does this to positive
- 11. a space for an electron on the outer shell of an atom
- 12. extra electrons have flown from one place to another, like lightning
- 14. positive does this to negative
- 16. one kind of atom; there are 118 of them
- 17. the part of the atom with a negative charge
- 18. matter that flows freely but keeps its volume, like water
- 19. a molecule made of one oxygen and two hydrogens
Down
- 1. the smallest element, has only one proton
- 2. anything that has mass and takes up space
- 5. matter that keeps its shape and density
- 6. the kind of bond where two atoms share electrons
- 7. having more electons on one side and less on the other
- 9. matter with no fixed shape or volume,usually invisible
- 10. the space an electron takes up around a nucleus
- 13. having more or fewer electrons than protons
- 15. the part of the atom that has no charge