What Is the Name That Refers to the Number of Donor

question 71

Multiple Choice

What is the name that refers to the number of donor atoms surrounding the central metal atom in a complex ion?

• A) Donor number
• B) Coordination number
• C) Metal number
• D) Metal-donor ratio
• E) Acceptor number

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Definitions:

Circadian Rhythm

A natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours, affecting physical, mental, and behavioral changes in living organisms.

Pineal Gland

A small, pine-cone-shaped endocrine gland in the brain that produces and secretes the hormone melatonin, which regulates sleep patterns.

Hypothalamus

A region of the brain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.

REM Sleep

A phase of sleep characterized by rapid eye movements, vivid dreaming, and increased brain activity.