Module 4 Flashcards
Main Group Elements
Those from the s and p blocks.
Ionic Compound
When metals from the s block combine with atoms from the p block to form a binary compound with ionic bonds holding the ions together.
Molecular Compound
When atoms from the p block combine with each other to form a compound with covalent bonds holding the atoms together.
The Octet Rule
An atom exhibits the tendency to attain a noble gas configuration either by sharing or transferring electrons.
Bond
A force that holds 2 atoms together.
Isoelectronic
Elements with the same number of electrons.
Lewis Symbol
The atomic symbol surrounded by the correct number of valence electrons.
Expanded Octet
More than 8 valence electrons.
Resonance Structures
Have the same spatial arrangement of atoms but a different distribution of electrons around the atom.
Equivalent Resonance Structures
The energy associated with each Lewis structure is the same. This means they have equal stability. Each resonance structure contributes equally to the overall structure.
Non-Equivalent Resonance Structures
Lewis structures have different energy and thus different stability considerations. There are major and minor resonance contributors. They do not contribute equally to the overall structure. Major and minor resonance structures are designated using formal charges.
↔
Represents that the actual structure is an average of the multiple structures not that it is oscillating between structures.
Resonance Hybrid
When more than one equivalent resonance structure can be drawn, the actual structure is the average of the equivalent resonance structures.
Delocalized Electrons
Are not associated with a single atom but can be distributed between other atoms.
Lattice Energy
Energy released when gas phase ions combine to form an ionic solid.
