Chapter 4

Question 1

Valence electrons of one atom attract to…..

Answer 1

Nucleus of other atoms

Question 2

Where are electrons located?

Answer 2

Nuclei

Question 3

Nuclei attracts…….. In the bond

Answer 3

Both electrons

Question 4

Why do bonds form?

Answer 4

Because of the forces that attract the atoms together.

Question 5

What does band formation do?

Answer 5

Lowers the pg of the system and stabilizes the system.

Question 6

The properties of compounds are?

Answer 6

Emergent

Question 7

What is the geometry for C atom in methane (CH4)?

Answer 7

Tetrahedral

Question 8

Bond angle fur C atom m methane is (ch4)?

Answer 8

109

Question 9

What is the hybridization for C atoms in methane? (CH4)

Answer 9

Sp3

Question 10

How many different isomers can you draw for the formula C5H12?

Answer 10

3

Question 11

Centers of electrons density + hybridization ?

Answer 11

2→ sp
3–> sp2
4–>sp3
5–>sp3d
6–> sp3d2

Question 12

Hybridization + electron geometry+ bond angle

Answer 12

Sp—>linear—->180
Sp2—>trigonal planar —>120
Sp3—> tetrahedral—>109 or 107.5 depending if it has lone pair
Sp3d—->trigonal bipyramid——>90 and 120
Sp3d2——> octahedral——->90

Question 13

Single bonds are?

Answer 13

Sigma bond

Question 14

All the rest of the bonds are always?

Answer 14

Pi bonds

Question 15

Sigma bonds allows…..

Answer 15

Rotation around the bond

Question 16

Pi bonds don’t

Answer 16

Allow for rotation around the bond

Question 17

To determine the shape of a molecule, consider……… not the………..

Answer 17

Only the atoms……not the lone pairs.

Question 18

What is the electron center geometry around the O? And the molecular shape? H2O

Answer 18

Electron geometry is tetrahedral
Molecular shape is bent

Question 19

What is the electron center geometry around the N? What is the shape of the molecule? NH3

Answer 19

Electron geometry is tetrahedral
Molecular shape is trigonal pyramidal.

Question 20

What is the electron center geometry around the C? What is the molecular shape of the molecule? For CO2

Answer 20

Electron geometry is linear
Molecular shape is linear

Question 21

An atom that has a high effective nuclear charge attracts its own……

Answer 21

Valence electrons and electrons from other atoms in bonds.

Question 22

An atom that has a high effective nuclear charge attracts its own valence electrons strongly and electrons from other atoms in bonds which is?

Answer 22

Electronegativity.

Question 23

Is the ability to attract electrons to itself in a bond.

Answer 23

Electronegativity

Question 24

Electronegativity depends on?

Answer 24

Effective nuclear charge.

Question 25

The attractive electrostatic force between the nucleus and the electrons is?

Answer 25

The effective nuclear charge

Question 26

The greater the effective nuclear charge the…….

Answer 26

More the electrons are attracted to the nucleus.

Question 27

Which is more electronegative? A. C B. N C. O D. Ne

Answer 27

O

Question 28

Which is more electronegative? A. F B. Cl C. Br D. I

Answer 28

F