Flashcards in Chapter 7 Deck (21)
___ bonds involve 2 atoms in which one of them steals electrons from the other
Does the octet rule allow exceptions?
Example : Hydrogen
What do anti bonding orbitals do to a molecule?
What type of bond is it when electrons are shared equally?
Non polar covalent bond
What type of bond is a pie bond?
Side to side
What is molecular resonance?
When the electron is always moving in a molecule because orbitals are not fixed.
What is an exception to the octet rule?
Some elemets such as boron are content with not having four shared pairs of electrons.
In the VESPR theory, an area of electron density can be what?
A pair of unshared electrons
What is the difference between symmetrical and asymmetrical molecules?
Symmetrical - Balanced, so they make a non polar bond
Asymmetrical - Unbalanced, so they make a polar bond
What theory states that when the two bonding orbitals are superimposed, the overlapping space containing both electrons become available to both nuclei, and both atoms acquire another valence electron that fills the vacancy in that particular orbital?
Valence bond theory
What theory suggests that the obitals of a molecules atoms are replaced by totally new orbitals when a molecule forms
Molecular obrital theory
Which theory focuses on the location of highest electron density surrounding the central atoms in a molecule, and tohse areas of negative electrical charge repel each other until they are as far apart as is gemoetrically possible?
Valence shell electron pair repulsion theory (VSEPR)
What is orbital hybrdization?
When orbitals of different energies combine together to form new orbitals
Partial charges on molecules are represented by what Symbol?
In a Lewis Diagram, the arrow with a plus sign points towards what?
The atoms with higher electronegativity.
Which shapesare always polar?
Bent , pyramidal
What describes the magnitude and direction of molecular polarity?
What symbol represents dipole moments?
Which shape is a Y-shaped arrangement with all 4 atoms lying in a single plane?
Molecular shape - linear
Polarity ignoring shape - polar covalent bond
Polarity with shape - non polar