Packet 2026 | Questions,
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Rationales Study Guide
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Updated 2026 Questions and Answers
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, NEUTRON A SUBATOMIC PARTICLE THAT IS NEUTRAL THEREFORE HAS NO CHARGE. IT IS
LOCATED IN THE NUCLEUS AND SERVES AS A STABILIZER. THE MASS OF A
NEUTRON IS SLIGHTLY GREATER THAN THE PROTON MASS AND HAS AN
ENORMOUS EFFECT ON THE QUANTUM SPIN VALUE OF AN ELEMENT. THE NET
CHARGE ON A NEUTRON IS 0
MAGNETISM IS DESCRIED AS THE ABILITY OF A SUBSTANCE TO ATTRACT IRON, COBALT
AND NICKEL. IT IS THE POWER OR FORCE CREATED BY A SUBSTANCE HAVING
THE PROPERTY OF CREATING OR INDUCING MAGNETIC DIPOLES. THE
MAGNETIC FIELD OF ANY MAGNET HAS A DIRECTION, SIGNIFIED NORTH AND
SOUTH. THIS PROPERTY OF A MAGNET MAKES IT A DIPOLE. DIPOLE - A
MAGNETIC FIELD CHARACTERIZED BY ITS OWN MAGNETIC NORTH AND
SOUTH POLES SEPARATED BY A FINITE DISTANCE.
MAGNETIC SUSCEPTIBILITY DEFINED AS THE TENDENCY OF A SUBSTANCE TO ATTRACT OR REPEL
MAGNETIC LINES OF FORCE DEPENDENT ON THE MAGNETIC PROPERTIES OF
ITS ELECTRONS.
DIAMAGNETIC THE PROPERTY OF MOST SUBSTANCES WITH PAIRED ORBITAL ELECTRONS
THAT HAVE OPPOSITE SPINNING AND THEIR MAGNETIC MOENTS CANCEL
EACH OTHER OUT. SUBSTANCES WITH DIAMAGNETIC SUSCEPTIBILITY
WEAKLY ATTRACT OR REPEL MAGNETIC LINES OF FORCE. MAGNETIC
SUSCEPTIBILITY OF MOST HUMAN BODY TISSUES ARE DESCRIBED AS
DIAMAGNETIC.
PARAMAGNETIC THE PROPERTY OF SUBSTANCES WITH POSITIVE MAGNETIC SUSCEPTIBILITY
THAT ATTRACT AND REPEL MAGNETIC LINES OF FORCE. THESE SUBSTANCES
(GADOLINIUM, METHEMOGLOBIN, FREE RADICALS) CONTAIN ONE OR MORE
UNPAIRED ORBITAL ELECTRONS AND PRODUCE MARKED REDUCTIONS IN
THE T1 AND T2 RELAXATION TIMES. UNPAIRED ORBITAL ELECTRONS SPIN IN
THE SAME DIRECTION AND HAVE THE TENDENCY TO LINE UP WITH THE
MAGNETIC FIELD. THEREFORE PRODUCING ADDITIONAL MAGNETIC FIELDS.
SUPER-PARAMAGNETIC THE PROPERTY OF SUBSTANCES WITH LARGE POSITIVE MAGNETIC
SUSCEPTIBILITY WHICH STRONGLY ATTRACT OR REPEL MAGNETIC LINE SOF
FORCE. THESE SUBSTANCES (HEMOSIDERIN AND SUPERPARAMAGNETIC
IRON OXIDE -SPIO) HAVE A SINGLE MAGNETIC DOMAIN AND ARE
MAGNETIZED IN A MAGNETIC FIELD. THEIR MAGNETIC SUSCEPTIBILITIES ARE
MUCH LARGER THAN THOSE OF PARAMAGNETIC SUBSTANCES AND SIMILAR
TO THOSE OF FERROMAGNETIC MATERIALS. UNLIKE FERROMAGNETIC
SUBSTANCES, SUPERPARAMAGNETIC MATERIALS DO NOT EXHIBIT RESIDUAL
MAGNETISM WHEN THE EXTERNAL FIELD IS REMOVED.
FERROMAGNETIC THE PROPERTY OF SUBSTANCES WITH LARGE POSITIVE MAGNETIC
SUSCEPTIBILITY THAT BECOME MAGNETIZED WITHIN A MAGNETIC FIELD AND
REMAIN MAGNETIZED AGTER BEING REMOVED FROM THE MAGNETIC FIELD.
FERROMAGNETIC SUBSTANCES INCLUDE A NUMBER OF IRON AN COBALT-
CONTAINING METALS.