1. Chemical Bonds
18.2

2. Atoms loan electrons so both can reach a stable energy level
Atoms loan electrons so both can reach a stable energy level. When atoms gain, lose, or share electrons, an attraction forms between the atoms. The atoms are pulled together to form a compound. The attraction creates a bond that joins the atoms.
A compound is completely different from the atoms that make it up. A compound has different physical and chemical properties from the atoms that are in it. A compound is two or more atoms bonded together

3. Ionic Bond Loses or gains electrons
Attraction between opposite charges of ions (positively or negatively charged atom)
Between metal and nonmetal

4. ions (positively or negatively charged atom)
Cation
positive charged ion
loses electrons
1+ written in the superscript
Anion
negative charged ion
gains electrons
1- written in the superscript

6. The Ionic Bond
two chlorine atoms gain one electron each and become negatively charged chloride ions, Cl −.
The result of this bond is a neutral compound.

7. Covalent Bond Shares electrons Can from multiple bonds; ex: N2 and O2
Between a nonmetal and a nonmetal

8. Polar Bonds covalent bond electrons are unequally shared
produces a molecule with a negatively-charged end and a positively charged end – polar molecule

10. Nonpolar Molecule
electrons are shared equally in the bond