Bonding General Concepts Part II

Question 1

LEWIS STRUCTURE

Answer 1

Valence electron configuration of covalent compounds

Question 2

What are the two types of electron pairs

Answer 2

Lone pairs —> not bonded

Bonding pairs —> bonded

Question 3

What is the most important requirement for making compounds

Answer 3

The formation of a stable compound contains the configuration of a noble gas

Question 4

Octet rule

Answer 4

Having eight valence electrons

Question 5

Steps for writing Lewis structure

Answer 5

1. Find the total number of valence electrons
2. Use the one pair (one line) to form a bond between central and outer
3. Arrange the remainder ass lone pairs on the outer atoms
4. If no unassigned remains but central atom doesn’t have eight, created double or triple bond

Question 6

What are the exceptions to octet rule

Answer 6

Atoms that lack electrons such as B and Be

Atoms that exceed S and P

Question 7

Resonance

Answer 7

When there is more than one valid Lewis structure indicated by a double heade3d arrow

Question 8

Why does resonance happen

Answer 8

Due to the declination of electrons meaning they are free to move around

Question 9

Formal charge

Answer 9

In order to know which Lewis structure is the best
Difference between the number fo electrons on the free atom and the number of valence electrons assigned to the atom in the molecule

Question 10

Formula for formal charge

Answer 10

of valence electron in free atom - 1/2bonding electrons-lone pairs

Question 11

What are the two assumptions about formal charge for Lewis structure

Answer 11

Atoms try have a charge as close to zero as possible any negative formal charges are expected to reside on the most electronegative atom

Question 12

What is the main theory of the VSEPR MODEL

Answer 12

Determined by minimizing electron pair repulsion’s

Question 13

Molecules containing 2 bonds

Answer 13

Separation 180

Geometry linear

Question 14

Molecules containing 3 bonds

Answer 14

Maximum separation 120

Geometry trigonal planar

Question 15

Molecules contains 4 bonding

Answer 15

Angle 109.5

Tetrahedral

Question 16

Molecules contains 1 lone pair 3 bonding

Answer 16

Angle 107

Trigonal planar

Question 17

2 bonding 2 lone pairs

Answer 17

Angle 105.5

Bent

Question 18

What is the difference between lone pairs and bonding

Answer 18

They exert more repulsive forces than bonding pairs which compresses the angle between bonding pairs

Question 19

Molecules containing 5 bonding pairs

Answer 19

Angle 3 cal on 90 ion horizontal plane

90 angle between horizontal and vertical Cl

Question 20

1 lone pair 4 bonding

Answer 20

See saw

Question 21

2 lone 3 bonding

Answer 21

T-structure

Question 22

3 lone 2 bonding

Answer 22

Linear

Question 23

Molecules containing six bonding pairs

Answer 23

90 angle

Octahedral

Question 24

1 lone 5 bonding

Answer 24

Square pyramidal

Question 25

2 lone 4 bonding

Answer 25

Square planar