Ionic Bonds

• Formed by a transfer of electrons

• Bonds between metal + oxygen are called oxides

• Bonds between metal + non-metal (except oxygen) are called salts

• Ionic Bonds have one element from the metals and one from the non-metals– Anion and cation are attracted to each other

Properties of Ionic Bonding

1. Ionic bonds are so strong, they create crystals

Properties of Ionic Bonds

2. Ionic compounds have high melting and boiling points

Properties of Ionic Bonds

3. Ionic compounds form electrolytes in water. Ions are free to move around and conduct electricity.

Ionic Formula WritingIonic compounds are composed of _______ and _________.

When writing an ionic formula, the total _______ charge must equal the total __________ charge b/c the number of electrons _________ must equal the number of electrons ________.

Always write the symbol of the _________ first, followed by the symbol of the _________.

The _____________ method is a short-cut to correct formula writing as long as we remember to simplify our subscripts!

Cl 1- S 2- F 1- N 3- O 2- P 3-

Cs 1+

Mg 2+

Cr 3+

Na 1+

H 1+

Zn 2+

Al 3+

Naming Ionic Compounds• Name Cation, Name Anion –ide• NaCl = sodium chloride• KF• Calcium + Phosphorus• Al2O3

• Beryllium + Neon