Question

members of which group easily lose an electron to form a +1 cation?
○ halogens
○ alkaline earth metals
○ noble gases
○ alkali metals

Explanation:

• Halogens (group 17) typically gain an electron to form -1 anions, not lose to form +1 cations.
• Alkaline earth metals (group 2) lose 2 electrons to form +2 cations.
• Noble gases (group 18) are stable and rarely form ions.
• Alkali metals (group 1) have 1 valence electron, so they easily lose that 1 electron to form a +1 cation.

Answer:

D. alkali metals