Ionic vs. Covalent Bonds

Ionic vs. Covalent Bonds

Stable or Unstable?

¢An atom is only stable if it has a full valence shell

Multiple Choice

Where are the Valence Electrons Located?

• Inside the nucleus

• In the inner shell

• In the outermost shell

What are Compounds?

• Compounds are formed when 2 atoms of different elements bond together.

• Atoms bond to fill their valence shell

• An atom will bond with as many atoms as it takes to fill its outer shell

• Once the valence shell is full, that atom is stable

Multiple Select

Select all of the compounds

• H2O

• H

• CO2

• CH4

Rules of the shells

1. The 1st shell can hold up to two electrons.

2. Each shell thereafter can hold up to 8 electrons. 

Will it bond?

• If an atom is stable, it Will not Bond

• If an atom is unstable, it will Bond

There are two types of Bonds

COVALENT vs IONIC

Covalent Bonds

• Covalent bonds exist between NONMETAL and NONMETAL.

  —Example: H2, H2O, NO3, CH4

  —

• Covalent bonds SHARE electrons.

• Shared electrons don’t belong to either atom.

Ionic Bonds

• ¢Ionic bonds exist between a non-metal and a metal

• When two atoms bond ionically, they gain/lose electrons

• When an atom gains or loses an electron, it becomes an ion

Multiple Choice

NaCl, Ionic or Covalent?

• Ionic

• Covalent

Multiple Choice

H2O, Ionic or Covalent?

• Ionic

• Covalent

Multiple Choice

NaBr, Ionic or Covalent?

• Ionic

• Covalent