Across
- 2. A table that shows the elements
- 5. A bond formed when atoms share electrons
- 7. The number of protons in an atom
- 9. Negatively charged particles
- 11. Locations where electrons may be found
- 12. A chemical band with one pair of electrons
- 15. Dots to represent valence electrons
- 17. Electrons on the outermost energy level
- 19. A chemical bond with three pairs of electrons
- 20. Atoms in the same element that have different numbers of nuetrons
- 21. The central part of an atom
Down
- 1. When atoms have more protons than electrons
- 3. The average mass of all the isotopes
- 4. A chemical bond with two pairs of electrons
- 6. The smallest part of an element
- 8. The smallest particle of a compound
- 10. When atoms have more electrons than protons
- 11. A pure substance made of only one type of atom
- 13. Particles with no charge
- 14. A chemical bond due to attraction
- 16. A charged atom due to the loss or gain of electrons
- 18. Positively charged particles