In What Way Are Elements in the Same Column of the Periodic

question 50

Multiple Choice

In what way are elements in the same column of the periodic table the same?

• A) They have the same number of protons.
• B) They have the same number of neutrons.
• C) They have the same number of electrons.
• D) They have the same number of electrons in their valence shell.
• E) They have the same number of electron shells.

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Definitions:

Melanopsin

A photopigment found in the retina that plays a key role in regulating circadian rhythms and pupillary reflex by responding to blue light.

Photoreceptor

Specialized retinal neuron that transduces light into neural activity.

Circadian Rhythms

Natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours, influencing physical, mental, and behavioral changes.

Retinohypothalamic Tract

A neural pathway that carries information from the retina to the hypothalamus, involved in regulating circadian rhythms.