Periodic Table
Across
- 5. an ion with a positive chage
- 6. another name for metalloid
- 8. any atoms having the same number of protons but a different number of neutrons
- 11. another name for period
- 12. the elemnts that are usually poor conductors of heat and electricity
- 15. electron an electron in the outermost energy level of an atom
- 19. a horizontal row of elements in the periodic table
- 20. the smallest particle that has the properties of an element
Down
- 1. a positively charged subatomic particle in the nucleus of an atom
- 2. the center of an atom; made up of protons and neutrons
- 3. an ion with a negative charge
- 4. an element that has properties of both a metal and nonmetal
- 7. a negatively charged subatomic particle found in the energy level of an atom
- 9. a vertical column of elements in the periodic table
- 10. the elements thta are good conductors of heat and electricity
- 13. a neutral subatomic particle in the nucleus of an atom
- 14. another name for group
- 16. number the number of protons in the nucleus of an atom
- 17. level any of the possible energies an electron may have in an atom
- 18. number the total number of protons and neutrons in the nucleus of an