5.1 VSEPR model

Question 0

what does VSEPR stand for?

Answer 0

valance shell e- pair repulsion

Question 1

what is the name given to the 3D arrangement of atoms in a molecule

Answer 1

molecular structure

Question 2

when is VSEPR best utilized?

Answer 2

to predict the 3D geometry of molecules formed from nonmetals

Question 3

the main idea of VSEPR

Answer 3

is to minimize e- pair repulsions

Question 4

what is the degree of the angles in a tetrahedral structure?

Answer 4

109.5

Question 5

when should prs of e-‘s be arranged tetrahedrally?

Answer 5

when there are 4 prs of e-‘s around an atom

Question 6

what is the first step in a VSEPR model?

Answer 6

draw the lewis structure

Question 7

what is the 2nd step to a VSEPR model?

Answer 7

count the e- pairs and arrange them in a way that minimizes repulsion (put them as far apart as possible)

Question 8

what is the 3rd step in a VSEPR model?

Answer 8

determine the positions of the atoms from the WAY the e- pairs are shared

Question 9

when does a molecular structure VSEPR model get named?

Answer 9

after the positions of the atoms is determined in step 3

Question 10

which requires more room? bonding pairs or lone pairs?

Answer 10

lone pairs

Question 11

because lone pairs require more room than bonding pairs, what happens to the angles between the bonding pairs?

Answer 11

they get compressed to give the lone pairs more space on the orbitals of the atom they belong to.

Question 12

what is the arrangement of 2 e- prs around an atom that yields minimum repulsion

Answer 12

linear

180 degrees

Question 13

what is the arrangement of 3 e- prs around an atom that yields minimum repulsion

Answer 13

Trigonal planar

120 degrees

Question 14

the tetrahedral arrangement of e- pairs is used for how many e- pairs?

Answer 14

4

109.5 degrees

Question 15

the trigonal bipyramidal arrangement of e- pairs is used for how many e- pairs?

Answer 15

5

120/90 degrees

Question 16

the octahedral arrangement of e- pairs is used for how many e- pairs?

Answer 16

6

90 degrees

Question 17

what is the molecular structure of a molecule with 4 bonding e- pairs?

Answer 17

tetrahedral

Question 18

what is the molecular structure of a molecule with 3 bonding e- pairs and 1 lone pr?

Answer 18

trigonal pyramid

Question 19

what is the molecular structure of a molecule with 2 bonding e- pairs and 2 lone e- prs?

Answer 19

V-shaped (or bent)

Question 20

what is the molecular structure of a molecule with 5 bonding e- pairs?

Answer 20

trigonal bipyramid

Question 21

the see-saw structure is seen in molecules with how many bonding and lone pairs?

Answer 21

4 bonding

1 lone pair

Question 22

the T-shaped structure is seen in molecules with how many bonding and lone e- prs?

Answer 22

3 bonding

2 lone prs

Question 23

what are the possible molecular structures for molecules with 4 e pairs?

Answer 23

tetrahedral
trigonal pyramid
v-shaped (or bent)

Question 24

what are the possible molecular structures for molecules with 5 e- pairs?

Answer 24

trigonal bipyramidal
see-saw
t-shaped
linear

Question 25

in VSEPR model, a double bond is counted as

Answer 25

on effective pair

Question 26

when a molecule exhibits resonance, which resonance structure should be used to predict the molecular structure in the VSEPR model?

Answer 26

any of them

Question 27

what degree angle provides lone pairs with enough space so that distortions do not occur?

Answer 27

120

Question 28

the mixing of the native atomic orbitals to create special orbitals for bonding

Answer 28

hybridization

Question 29

sp3 hybridization or saying an atom is sp3 hybridized means

Answer 29

its orbitals formed from 1 2s and 3 2p orbitals (s1p3)

Question 30

whenever a set of equivilent tetrahedral atomic orbitals is required by an atom in a molecule, the model assumes that the atom adopts a set of ___ orbitals; the atom is ____ ________

Answer 30

sp3

sp3 hybridized