The vertical rows are called:

Valence electrons correspond to the:

The number os energy levels corresponds to the:

The electrons in the outer-most energy level are the:

The alkali metals are group:

The alkaline earth metals are group:

The halogens are group:

The noble gases are group:

Hydrogen is a:

________________ is a measure of the tendency of an atom to attract a bonding pair of electrons.

________________ is the distance between an atom's nucleus and outer electron shell.

The atomic radius can be directly measured.

________________ is the energy required to remove an electron from its orbital around an atom to a point where it is no longer associated with that atom.