Which Statement Explains Why Isotopes Have Different Mass Numbers

question 62

Multiple Choice

Which statement explains why isotopes have different mass numbers?

• A)Isotopes differ in the number of protons each contains.
• B)Isotopes differ in the number of electrons each contains.
• C)Isotopes differ in the number of neutrons each contains.
• D)Isotopes differ in the number of protons and neutrons each contains.
• E)Isotopes differ in the number of protons and electrons each contains.

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Definitions:

Sympathetic

Pertaining to the part of the autonomic nervous system that increases alertness, muscle tension, and energy expenditure in response to stress.

Somatic

Pertaining to the body, especially as distinct from the mind or the emotions.

Central

The core or most important part; in many contexts, it can refer to the central nervous system which includes the brain and spinal cord.

Growth Hormones

Proteins secreted by the pituitary gland that stimulate growth, cell reproduction, and cell regeneration in humans and other animals.