IONIC BONDING October 31 2013 IONIC BONDING What

IONIC BONDING October 31, 2013

IONIC BONDING What is Ionic Bonding? � One type of bonding where valence electrons transfer from one METAL atom to a NONMETAL atom ◦ ONLY VALENCE ELECTRONS TRANSFER!!! � GOAL: to fill your outermost shell Magic number is: 8 (except H) • � Atom goes from being a neutral particle to being a charged particle ◦ ◦ Neutral means it has the same number of protons and electrons Charged means it has a different number of protons than electrons

IONIC BONDING What are the results? �A ◦ ◦ charged atom called an ION. Ions are either positively or negatively charged The charge depends on if valence electrons are given or taken by an atom � Less electrons than protons means you have a positively charged ion ◦ There are more positive protons than negative electrons � More electrons than protons means you have a negatively charged ion ◦ There are more negative electrons that positive protons

IONIC BONDING Patterns you will see � Metals lose electrons and will gain a positive charge � Metals have less electrons and it is easier/takes less energy to give 1 or 2 electrons than it is to take 6 or 7 electrons. � When something has a positive charge it will be written like so: Li +1 (symbol, “+” sign and then the number of electrons it has lost) � Nonmetals gain electrons and will gain a negative charge � Nonmetals have more electrons and it is easier/takes less energy to take 1 or 2 electrons than it is to give 6 or 7 electrons � When something has a negative charge it will be written like so: Cl -1 (symbol, “-” sign and then the number of electrons it has gained)