You Spin Me Right Round

What determines whether a nucleus is NMR active?

• Mass Number

• Number of Protons

• Number of Neutrons

• Number of Protons and Neutrons

If both the mass number and atomic number are even, what spin is the nucleus?

• integer spin

• 1/2 integer spin

• I = 0

If both the mass and atomic numbers are odd, what spin is the nucleus?

• Integer

• 1/2 integer

• I = 0

Which list below indicates the properties that must be considered when choosing a nucleus for experiment?

• I, natural abundance, reference compound

• I, receptivity, observation frequency

• Natural abundance, magnetogyric ratio, reference compound

• I, receptivity, magnetogyric ratio

²³Na is a quadrupolar nucleus. What does this mean?

• I = 0

• I = 1/2

• I > 1/2