1 of 1

An electron in the outermost shell

form ions that are larger than their atoms

Group

Stable full valence shell (8 valence e-)

Coulombic Attraction

Group 17. Most active non-metals

Valence Electron

The attraction that electrons feel from protons

HOFBrINCl

Diatomic Elements

metallic character

Octet Rule

Metal

indicates reactivity of a metal

Halogens

Vertical column of the Periodic Table

Period

A horizontal row of elements on the Periodic Table

Alkali Metals

Group 1. Very active metals

nonmetal

Elements that produce colored ions and have multiple oxidation states

Ductile, malleable, good conductors, high m.p.

Transition Metals

2 valence e-

Atomic

radius

form ions that are smaller than their atoms

metals

Alkaline Earth Metals

A measure of how much an element attracts an electron in a bond

Electronegativity

size of the atom

How much energy it takes to remove an e-

Ionization Energy