Ions and Ionic Compounds

An ION is an electrically charged atom or group of atoms formed by the loss or gain of electrons.

Types of Ions

• Cations: (positively charged) formed by the loss of electrons.
• Anions: (negatively charged) formed by the gain of electrons.

The formation of an ion will change the number of electrons ONLY, not the protons.
ex:
rubidium-81

In addition to elements forming ions by themselves.... elements can also come together to form ionic compounds.

An IONIC COMPOUND is a chemical
compound of cations and anions
which are held together by ionic bonds in a structure.

Note: Ionic compounds will only occur between a metal and nonmetal.

One atom will "give away" valence electrons to complete the outer shell of another atom.

Example

Table Salt (NaCl)

Calcium Chloride (CaCl)

QuIZ tIME!

How many types of ions are there?

• 1
• 2
• 3
• 4

Which of the following is a type of ion?

• Dogion
• anion
• metal
• catalyst

What is an ion?

• An element
• A compound formed when there is a loss or gain of electrons
• an electrically charged atom(s) formed by the loss or gain of electrons.
• a type of electron

wHICH WAS USED AS AN EXAMPLE OF AN ION?

• Rubidium-81
• Table Salt
• Calcium Chloride
• Magenesium (+2)

What is an ionic compound?

• A chemical compound of cations and anions held together by ionic bonds in a
• a sharing of electrons
• a transfer of electrons

True or false

• An ionic compound can only be formed between two metals.

Which would qualify as an ionic compound?

• Potassium bromide
• Hydrogen chloride
• Carbon Dioxide