How Many Electrons Are in the Valence Shell of the Atom

question 45

Multiple Choice

How many electrons are in the valence shell of the atom shown here?

• A)two
• B)five
• C)seven
• D)four

Recognize the importance of sensory functions provided by the skin.

Understand the role of the skin in regulating body temperature and protecting against external harm.

Identify the causes and treatment options for common hair and scalp conditions.

Understand the importance of immediate and appropriate care for ocular emergencies.

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Definitions:

Osmoconformer

An animal in which the salt concentration of body fluids varies along with changes in the surrounding sea water so that it stays in osmotic equilibrium with its surroundings.

Osmoregulator

An organism that regulates its internal osmotic pressure, maintaining fluid and electrolyte balance despite external conditions.

Antidiuretic Hormone

A hormone released by the pituitary gland that regulates water retention in the body by increasing the concentration of solutes in the blood.

Collecting Ducts

Tubules in the kidneys that receive urine from the nephrons and transport it into the renal pelvis and ureter.