Question

which elements on the periodic table are the least reactive? (1 point)
o the group with helium at the top
o the group with carbon at the top
o the group with hydrogen at the top
o the group with fluorine at the top

Explanation:

The noble - gas group, with helium at the top, has a full outer electron shell, making them very stable and least reactive. Carbon - group elements can form various compounds, hydrogen is reactive in many chemical reactions, and the fluorine - group (halogens) is highly reactive.

Answer:

the group with helium at the top