2. IONIC BONDING When an atom of a nonmetal takes one or more electrons from an atom of a metal so both atoms end up with eight valence electrons

3. IONIC BONDING IS THE COMPOUND AN IONIC COMPOUND?METAL NONMETAL SUBSCRIPTS

4. IONIC BONDING ION – any atom with more or less electrons than it is supposed to have causing the atom to have a charge (+) or (-)* *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 The Octet Rule Atoms tend to gain, lose, or share electrons in order to acquire a full set of valence electrons

6. IONIC BONDING Metals will tend to lose electrons and become POSITIVE CATIONS Normal sodium atom loses one electron to become sodium ion

7. IONIC BONDING Nonmetals will tend to gain electrons and become NEGATIVE ANIONS Normal chlorine atom gains one electron to become a chloride ion

8. Na +1 is called a sodium ion The +1 symbol means it has lost one electron IONIC BONDING

9. Mg +2 is called a magnesium ion The +2 symbol means it has lost two electrons IONIC BONDING

10. S -2 is called a sulfide ion The -2 symbol means it has gained two electrons IONIC BONDING

11. Cl -1 is called a chloride ion The -1 symbol means it has gained one electron IONIC BONDING

12. 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. IONIC BONDING becomes

14. 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”

15. IONIC BONDING aluminumoxygen aluminumoxide

16. 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?

17. 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.

18. 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 Al 2 O 3 would be ________________________.