Periodic Table
Across
- 3. have a positive charge, found in the nucleus of the atom
- 4. (also known as group) elements react and have similar properties
- 6. atoms will always react until they have a full shell
- 8. all of the elements to the left of the staircase (except for Hydrogen), are typically hard
- 10. the number of protons in an atom
- 12. everything to the right of the staircase line, are brittle and gaseous
- 16. the most reactive family on the periodic table
- 18. have no charge (found in the nucleus)
- 19. a substance made of 2 or more elements chemically combined
- 20. a type of mixture where the particles can be seen because they look different
Down
- 1. a type of mixture where the particles cannot be seen because they look the same
- 2. tell how many shells each element has
- 5. total of protons and neutrons in an atom
- 7. the number of electrons in the outermost shell
- 9. pure substances that cannot be broken down into something simpler by chemical means
- 11. the family that has properties of both metals and nonmetals, this family touches the "staircase line"
- 13. the only non-reactive family on the periodic table
- 14. negative charge (found in the shell)
- 15. composed of 2 or more compounds physically combined
- 17. the smallest unit of an element