BSES 26

Question 1

they represent the probability of finding an electron in any one place. they correspond to the different energies. so an electron in an orbital has definite energy. orbitals are best described with quantum mechanics

Answer 1

orbitals

Question 2

the region in space just outside the nucleus of the atom where the probability of finding the electrons is at the highest (95%)

Answer 2

atomic orbitals

Question 3

formed as a result from the overlap of two atomic orbitals, wherein a pair of electrons occupying.

Answer 3

molecular orbitals

Question 4

a measure of the probability of finding an electron in an orbital.

Answer 4

electron density

Question 5

mathematical description of the volume of space occupied by an electron having a certain amount of energy

Answer 5

wave function

Question 6

is the place where a crest and a trough of energy

Answer 6

a node in an orbital

Question 7

is based on the wave properties of matter. quantization of energy is the consequence of these properties

Answer 7

quantum mechanics

Question 8

the energy levels about the nucleus contain group

Answer 8

atomic orbitals

Question 9

atomic orbitals are designates as

Answer 9

s, p, d, and f

Question 10

what are the three p orbitals of equal energy

Answer 10

px, py, and pz

Question 11

the number describes the energy level that the electron occupies. it can have a value of 1-7. this defines the “level” of the electron

Answer 11

principal quantum number

Question 12

this number describes the shape of the orbital that the electron is found in. it can have a value from 0-3. this defines the “sublevel” of the electron. also, the numbers can be replaced by letters according to the following:

0 = S
1 = P
2 = D
3 = F

Answer 12

orbital (azimuthal) quantum number

Question 13

this number describes the orientation of the electron in the orbitals. this defines the “orbital” of the electron. there are 2L+1 orbitals in each sublevel.

Answer 13

magnetic quantum number

Question 14

this number describes the direction of spin of the electron in the orbital

Answer 14

spin quantum number

Question 14

are spherical regions where the probability of finding an electron is zero

Answer 14

radial nodes

Question 14

it states that no two electrons may have the same set of quantum numbers

Answer 14

pauli exclusion and the build up principles

Question 15

result from the combination of atomic orbitals

Answer 15

molecular orbitals

Question 16

is an indicator of the bond strength and length. a bond order of 1 is equivalent to a single bond. fractional bond orders are possible

Answer 16

bond order

Question 17

hybridization is a major players in this approach to bonding

Answer 17

valence bond theory

Question 18

there are two ways orbitals can overlap to form bonds between atoms

Answer 18

valence bond theory

Question 19

head-to-head overlap

Answer 19

sigma bonds

Question 20

cylindrical symmetry of an electron density about the internuclear axis

Answer 20

sigma bonds

Question 21

side-to-side overlap

Answer 21

pi bonds

Question 22

electron density above and below the internuclear axis

Answer 22

pi bonds

Question 23

defined as the concept of mixing two atomic orbitals to give rise to a new type of hybridized orbitals. this intermixing usually results in the formation of hybrid orbitals having entirely different energy, shapes, etc.

Answer 23

hybridization

Question 24

an extension of the valence bond theory, and it helps us to understand the formation of bonds, bond energies, and bond lengths

Answer 24

hybridization

Question 25

redistribution of the energy of the energy of orbitals of individual atoms to give orbitals of equivalent energy happens when two atomic orbitals combine to form a hybrid orbital in a molecule.

Answer 25

hybridization

Question 26

observed when one s and one p orbital in the same main shell of an atom mix to form two new equivalent orbitals

Answer 26

sp hybridization

Question 27

observed when one s and two p orbitals of the same shell of an atom mix to form 3 equivalent orbitals

Answer 27

sp2 hybridization

Question 28

when one s orbital and 3 p orbitals belonging to the same shell of an atom mix together to form four new equivalent orbitals

Answer 28

sp3 hybridization

Question 29

involves the mixing of 1s orbitals, 3p orbitals, and 1d orbital to form 5

Answer 29

sp3d hybridization

Question 30

arrangement of sp

Answer 30

linear

Question 31

arrangement of sp2

Answer 31

triangular planar

Question 32

arrangement of sp3

Answer 32

tetrahedron

Question 33

arrangement of sp3d

Answer 33

triangular bipyramid

Question 34

sp measurement

Answer 34

180 degrees

Question 35

sp2 measurement

Answer 35

120 degrees

Question 36

sp3 measurement

Answer 36

109.5 degrees

Question 37

sp3d measurement

Answer 37

90 and 120 degrees