4. IONIC BONDING
ION – any atom with more or
less electrons that it is
supposed to have*
*Remember that the number of electrons
is supposed to be equal to the number of
Protons if the atom has a neutral charge
5. IONIC BONDING
Metals will tend to lose
electrons and become
POSITIVE CATIONS
Normal sodium atom loses one electron to become sodium ion
6. IONIC BONDING
Nonmetals will tend to gain
electrons and become
NEGATIVE ANIONS
Normal chlorine atom gains an electron to become a chloride ion
7. Na+1 is called a sodium ion
The +1 symbol means it
has lost one electron
IONIC BONDING
8. Mg+2 is called a magnesium ion
The +2 symbol means it
has lost two electron
IONIC BONDING
9. S-2 is called a sulfide ion
The -2 symbol means it
has gained two electron
IONIC BONDING
10. Cl-1 is called a chloride ion
The -1 symbol means it
has gained one electron
IONIC BONDING
11. To find the chemical formula for
an ionic compound
IONIC BONDING
•Write the ion formula for the cation first
•Write the ion formula for the anion next
•criss-cross the charge numbers
to become subscripts
13. To find the name of an ionic
compound
IONIC BONDING
•Name the positive element (metal) first
•Name the negative element (nonmetal) last
•Change the ending of the nonmetal to “-ide”
19. REVIEW QUESTIONS
1. What part of the atom is involved in ionic
bonding?
2. Ionic compounds are made of one
element that is a __________ and one
element that is a ____________.
3. What is an ion?
20. REVIEW QUESTIONS
4. Metals will _______ electrons and
become ions with a __________ charge.
5. Non metals will _______ electrons and
become ions with a ________ charge.
6. An ion with a +3 charge means the atom
has _________________ electrons.
21. REVIEW QUESTIONS
7. An ion with a -2 charge means that the
atoms has _______________ electrons.
8. The formula for potassium chloride would
be ______________.
9. The name of the chemical Al2O3 would be
________________________.
