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

The correct answer to the question is alkali metals.

Halogens are group 17 elements. They have 7 valence electrons. They are non metals and they form ion by accepting electron. Hence, they form anion.

Alkaline earth metals are the group 2 elements. They have 2 valence electrons. They form cation by losing their 2 valence electrons.

Noble gas are the group 18 elements. They have completely filled outermost shell. They do not form ion.

Alkali metals are the group 1 elements. They have 1 valence electron. They form cation by losing their 1 valence electron.

Considering the options given in the question above, the correct answer to the question is alkali metals.

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