What Is the Mass Number of an Atom of Potassium

question 11

Multiple Choice

What is the mass number of an atom of potassium that has 20 neutrons?

• A)15
• B)19
• C)35
• D)39
• E)59

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Definitions:

Sympathetic

Pertaining to the part of the autonomic nervous system that is responsible for preparing the body for action, especially in situations threatening survival.

Parasympathetic

Part of the autonomic nervous system responsible for conserving energy and calming the body after periods of stress or danger.

Central

Referring to the importance or essential nature of something; often used to describe things that are at the core or in the middle of a structure or concept.

Somatic

Relating to or affecting the body, distinct from the mind or psyche.