periodic table
Across
- 2. another name for metalloid
- 6. another name for period
- 7. center of at atom
- 8. the process of adding electrons to or removing electrons from an atom or group of atoms
- 11. an ion with a negative
- 13. a negatively charged subatomic particle found in the energy level of an atom
- 15. symbolfor mass number
- 17. neutral subatomic particle in the nucleus of an atom
- 19. an atom or a group of atoms that has lost or gained one or more electrons and therefore has a net electric charge
- 20. another name for group
Down
- 1. an element that has properties of both a metal and nonmetal
- 3. a vertical column of elements in the periodic table
- 4. the properties of elements tend to repeat in a regular pattern when elements are arranged in order of increasing atomic number
- 5. a horizontal row of elements in the periodic table
- 9. symbol for atomic number
- 10. smallest particle that has a propeertie
- 12. a positively charged subatomic particle in the nucleus of an atom
- 14. the elemnts that are usually poor conductors of heat and electricity
- 16. the elements thta are good conductors of heat and electricity
- 18. region in an atom where there is a high probability of finding electrons