Where are the valence electrons located in an atom?

• A. Between the nucleus and the first electron shell
• B. In the innermost electron shell
• C. In the outermost electron shell
• D. In the nucleus

Answer: (C)

Verified step by step guidance

1. Understand that electrons in an atom are arranged in energy levels or shells around the nucleus.
2. Recall that valence electrons are the electrons involved in chemical bonding and reactions.
3. Recognize that valence electrons are located in the outermost electron shell of an atom, which is the shell farthest from the nucleus.
4. Note that electrons closer to the nucleus, in inner shells, are called core electrons and do not typically participate in bonding.
5. Therefore, the valence electrons are not between the nucleus and the first shell, nor in the nucleus, but specifically in the outermost electron shell.