Chapter 8 - Covalent Bonding

Question 0

what is a formula unit

Answer 0

the lowest whole-number ratio of ions in an ionic compound

Question 1

what is a molecule

Answer 1

neutral group of atoms joined together by covalent bonds

Question 2

Why do atoms want to share electrons in a covalent bond?

Answer 2

to achieve an octet

Question 3

How many single bonds can group 4a atoms make?

Answer 3

4

Question 4

how many single bonds can 5a atoms make

Answer 4

3

Question 5

how many single bonds can group 6a make

Answer 5

2

Question 6

how many single bonds can group 7a make

Answer 6

1

Question 7

which group forms diatomic molecules with a single bond

Answer 7

halogens

Question 8

what other element forms a diatomic molecule with a single bond

Answer 8

hydrogen

Question 9

which elements form diatomic molecules with a single bond

Answer 9

hydrogen

Question 10

which elements form diatomic molecules with double bonds with example

Answer 10

Group 6a

oxygen

Question 11

which elements form diatomic molecules with triple bonds with example

Answer 11

group 5a

nitrogen

Question 12

what does a molecular formula tell you

Answer 12

how many atoms of each element a molecule contains

Question 13

what does the structural formula tell you

Answer 13

arrangement of covalently bonded atoms

Question 14

what does structural formula not tell you

Answer 14

shape

Question 15

what is the bond dissociation energy

Answer 15

the energy required to break the bond between two covalently bonded atoms

Question 16

which will have a smaller bond dissociation energy, single or double bond?

Answer 16

single

Question 17

stronger bonds have what kind of bond dissociation energies

Answer 17

larger

Question 18

what is resonance

Answer 18

the ability of a structure to be drawn as an electron dot structure two or more valid ways

Question 19

are there exceptions to the octet rule?

Answer 19

yes

Question 20

how are molecular orbitals formed

Answer 20

atomic orbitals overlap when sharing electrons

Question 21

how many electrons can be in any molecular orbital

Answer 21

2

Question 22

which model of the atom is the molecular orbital based on

Answer 22

quantum mechanical

Question 23

what is VSEPR theory?

Answer 23

the repulsion between electron pairs causes molecular shapes to adjust so that the valence electron pairs stay as far apart as possible

Question 24

angle measurement in tetrahedral

Answer 24

109.5

Question 25

angle measurement in linear

Answer 25

180

Question 26

angle measurement in trigonal pyramidal

Answer 26

107

Question 27

angle measurement in trigonal planar

Answer 27

120

Question 28

bent angle measurement

Answer 28

105, 116