Periodic Table

2. materials which have a conductivity between conductors (generally metals) and nonconductors or insulators
4. An element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
8. A table of elements arranged in the order of their atomic numbers and arranged in groups and periods.
9. 18th or the rightmost column of elements in the periodic table and are very un-reactive.
10. 2nd group (Vertical Column) in the periodic table, 2nd most reactive metals.
13. Substance that can be drawn into wires.
15. a representation of the valence electrons of an atom that uses dots around the symbol of the element. The number of dots equals the number of valence electrons in the atom.
18. Two or more different physical forms of a element.
20. Elements that are located to the right of the periodic table, typically poor conductors of heat and electricity.
21. a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
22. Electrons in the outermost energy level of an atom.

1. Elements with atomic number greater than Uranium (92)
3. Substance that can be beaten into sheets.
5. horizontal row in the periodic table having elements with the same # of energy levels.
6. Elements between the representative elements; 3rd to 12th column.
7. Electrostatic force of attraction between two metallic atoms
11. Atomic mass unit: Unit to measure the relative mass of atoms and molecules.
12. 17th column elements of the periodic table; most reactive of all nonmetals
14. Vertical columns in the periodic table holding elements with the same # of valence electrons
16. Molecule made up of two atoms
17. First group (vertical column) in the periodic table, most reactive of all metals.
19. Metal that emits Alpha, Beta or gamma particles.