Unit 1 exam: Ionic bonding and simple ionic compounds

Ions

Charged atoms (positive/negative)

Octet rule

Elements gain, lose, or share electrons to form an octet in their valence shell

Chemical bond

Strong attraction between atoms resulting in a lower energy state

Ionic Compound

Resulting compound of an ionic bond

Composed of Cation(s) (usually metals) and Anion(s) (usually nonmetals)

Ionic bond

Oppositely charged ions attract each other to form an ionic bond (usually includes at least 1 metal)

Covalent bond

The bond made by electron sharing between atoms (nonmetals)

Cation

Positively charged ions

Anion

Negatively charged ions

Isoelectronic

Same number of electrons

It is isoelectronic if it has the same number of electrons as the nearest noble gas

Relation of charge of an atom given its location on the periodic table

Group 1- 1+

Group 2- 2+

Group 13- 3+

Group 17- 1-

Group 16- 2-

Group 15- 3-

How to draw Lewis Diagram

Chemical formula

List of elements in a compound and the ratio of each element

All compounds are neutral, total charge of all ions must equal 0

Mass formula

the sum of the atomic masses of all atoms in an ionic compound represented by its chemical formula