periodic table

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

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