IONS & IONIC COMPOUNDSKayla McAuley

Chemical Reactivity

Some elements are highly reactive while others arent

A chemical reaction: A transformation resulting in a change of composition, constitution and/or configuration of a compound ( referred to as the reactant or substrate )-http://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/react1.htm

Noble Gases Are The Least Reactive Elements

Group 18 in periodic table They show almost no activity

because there stable ! Meaning they have all of there electrons in there outer shell

These gases are helium, neon, argon, krypton, xenon, & radon

Alkali Metals & Halogens Are Most Reactive Elements

Because of the octet rule, an atom whose outer s & p orbital's do not match the electron configurations of a noble gas will react to lose or gain electrons so outer orbital's will be full

Words To Know !!!

Ion : an atom, radical, or molecule that has gained or lost one or more electrons an has a negative or positive charge

Cation : an ion that has a positive charge

Anion : an ion that has a negative charge

Did You Know ?

Many atoms form stable ions have noble-gas configurations !

Helium is an exception from the rule … it only has 2 !

Sources

http://my.hrw.com/tabnav/controller.jsp?isbn=0030724945