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
IONIC BONDING IS THE COMPOUND AN IONIC COMPOUND?METAL NONMETAL SUBSCRIPTS
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
IONIC BONDING The Octet Rule Atoms tend to gain, lose, or share electrons in order to acquire a full set of valence electrons
IONIC BONDING Metals will tend to lose electrons and become POSITIVE CATIONS Normal sodium atom loses one electron to become sodium ion
IONIC BONDING Nonmetals will tend to gain electrons and become NEGATIVE ANIONS Normal chlorine atom gains one electron to become a chloride ion
Na +1 is called a sodium ion The +1 symbol means it has lost one electron IONIC BONDING
Mg +2 is called a magnesium ion The +2 symbol means it has lost two electrons IONIC BONDING
S -2 is called a sulfide ion The -2 symbol means it has gained two electrons IONIC BONDING
Cl -1 is called a chloride ion The -1 symbol means it has gained one electron IONIC BONDING
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
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?
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.
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 ________________________.