Periodic Table

2. the elements that are good conductors of heat and electricity
6. the elements that are usually poor conductors of heat and electricity
7. a vertical column of elements in the periodic table
9. level any of the possible energies an electron may have in an atom
11. gas family group 18 or 8A
14. an element that has properties of both a metal and nonmetal
16. a positively charged subatomic particle in the nucleus of an atom
17. a region in an atom where there is a high probability of finding electrons
18. a negatively charged subatomic particle found in the energy level of an atom

1. the center of an atom; made up of protons and neutrons
3. number the number of protons in the nucleus of an atom
4. earth metal family group 2 or 2A
5. the smallest particle that has the properties of an element
8. law the properties of elements tend to repeat in a regular pattern when elements are arranged in order of increasing atomic number
10. family group 16 or 6A
11. a neutral subatomic particle in the nucleus of an atom
12. family group 17 or 7A
13. family group 1 or 1A
15. a horizontal row of elements in the periodic table