​Atoms are organized in groups called:

​The particles that make up the nucleus are called:

Atoms with the same number of protons but different numbers of neutrons are called:

​The human body consists of approximately how much water?

​The simplest nucleus used in MRI is

The gyromagnetic ratio of hydrogen is:

​In most materials such as soft tissue, magnetic moments are:

​Net magnetization is symbolized by:

The reason magnetic moments align with or against the field is due to:

​In MRI, more magnetic moments align:

​In MRI, the patient effectively becomes a:

Two north poles of magnets will:

A north pole and south pole will:

The main external magnetic field in MRI is called:

Alignment parallel to the magnetic field is called:

Alignment opposite to the magnetic field is called:

Which alignment has lower energy?

​Protons spin around their: