The Sequence of Thermonuclear Fusion Processes Inside Massive Stars Can

question 29

Multiple Choice

The sequence of thermonuclear fusion processes inside massive stars can transform elements such as carbon and oxygen into heavier elements and generate excess energy until iron has been produced.Why is it NOT possible for fusion reactions to release energy from iron nuclei?

• A) The electrostatic charge of iron nuclei is so great that other nuclei cannot approach closely enough to react with them.
• B) Iron has the largest nucleus of all elements, and fusing other nuclei with iron actually reduces the size of the nucleus.
• C) Iron is the heaviest naturally occurring element.
• D) The protons and neutrons in an iron nucleus are so tightly bound together that fusing other nuclei with iron absorbs energy rather than releasing it.

---

Definitions:

Transgender

Indicates persons for whom their gender identity does not match the sex designated to them at birth.

Bisexual

Refers to an individual who is attracted to both male and female genders.

Asexual

A sexual orientation characterized by a lack of sexual attraction to others, or low or absent interest in or desire for sexual activity.

Sexual Orientation

Sexual orientation refers to an enduring pattern of romantic or sexual attraction to persons of the opposite sex, same sex, both sexes, or more than one gender.