Question

question 8 of 25
which family contains elements with a full octet of valence electrons?

a. the halogens

b. the alkali metals

c. the noble gases

d. the actinides

Explanation:

• Halogens (Group 17) have 7 valence electrons, needing one to complete the octet.
• Alkali metals (Group 1) have 1 valence electron, likely to lose it.
• Noble gases (Group 18) have a full octet (or 2 for He) of valence electrons, making them stable.
• Actinides are a series of radioactive elements, not defined by a full octet of valence electrons.

Answer:

C. The noble gases