NMR

Question 1

Electrons have a property call

Answer 1

spin

Question 2

in a magnetic field what does it do to the spin

Answer 2

it can cause the electron to move to the next energy spin level

Question 3

in a magnetic field what does it do to the spin

Answer 3

it can cause the electron to move to the next energy spin level

Question 4

Other subatomic parts have

Answer 4

spin qualities too

Question 5

nucleons

Answer 5

pair up so there is no net angular momentum

Question 6

is nucleons do not pair up

Answer 6

it is hard to predict spin

Question 7

odd mass nucleons

Answer 7

have half integral spin

Question 8

odd proton and neutron spin

Answer 8

have integer spin value

Question 9

even nucleon

Answer 9

have no spin value

Question 10

what does the frequency of nmr rely on

Answer 10

magnetic field size
the nucleus observed

Question 11

the greater the strength of magnetic field

Answer 11

the greater the energy gap between spin state. the smaller the frequency of radio photons that are needed to to excite transition

Question 12

what do electrons do to the magnetic field ?

Answer 12

shield

Question 13

why do electrons shield?

Answer 13

The electrons that surround the nucleus are in motion so they created their own electromagnetic field. This field opposes the the applied magnetic field and so reduces the field experienced by the nucleus.