J J Thomson Studied Cathode Ray Particles (Electrons) and Was Able

question 17

Multiple Choice

J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

• A)the mass/charge ratio varied with as the cathode material was changed.
• B)the charge was always a whole-number multiple of some minimum charge.
• C)matter included particles much smaller than the atom.
• D)atoms contained dense areas of positive charge.
• E)atoms are largely empty space.

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Definitions:

Sternocleidomastoid Muscle

A muscle in the neck that runs from the sternum and clavicle to the mastoid process of the temporal bone, involved in the rotation and flexion of the head.

Sternal End

The end of a bone that is closest to the sternum, often referring to the ends of the ribs or the clavicle.

Insertion

The point or mode of attachment of a skeletal muscle to the bone or other body part it moves.

Orbicularis Oris

A complex of muscles in the lips that encircles the mouth, controlling the movements involved in lip closure, puckering, and speech.