Page 146 - Science Course 2 (Book 1)

Mo.5-L3a: What is Ionic Bonding?

8 electron Key Concept
8 electrons 8 electrons What is Ionic Bonding?
2 electrons 2 electrons
What holds ionic compounds together?

The positively charged sodium ion and the
negatively charged chlorine ion attract each
other. Together they form a strong ionic bond.

Covalent versus Ionic Bond

– –
atoms
+ +

SUMMARY
Sharing of
Electrons Covalent bond What is Ionic Bonding?

Metal atoms lose electrons and nonmetal
– atoms gain electrons and form stable
+ + compounds. An atom that has gained or lost
an electron is an ion.
– (+)
Molecule

–
atoms

+ +
– An ionic bond forms between positively and
negatively charged ions
Transfer of (+) (–)
Electron Ionic bond

–

+ + + • • –
Na • • • •
– Cl• •
Positive Negative
ion ion

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