Across
- 1. Number of protons and number of electrons in an atom of an element
- 3. Number of protons added with the number of neutrons
- 5. An abbreviation for the element
- 9. The basic building block of matter (makes up everything)
- 10. 2 or more substances physically combined; easily separated
- 11. Part of an atom that has negative charge
- 12. Part of an atom that has a positive charge
Down
- 2. Part of an atom that has no charge or neutral charge
- 4. Does not have uniform appearance (can easily see the different parts)
- 6. Pure substances made of 1 type of atom
- 7. Mixture that has uniform appearance (can't see the different parts)
- 8. 2 or more elements chemically combined