Which element will most easily lose an electron? A krypton
B calcium
C potassium
D boron

C

Explanation:

The elements that will most likely lose an electron are those that are in Group 1. This is because they only have one valence electron in their outer shell. Atoms want to have 8 electrons in their outer shell and in order for the elements of Group 1 to do so, they could either lose one electron or gain 7 but losing one is easier to do. Out of these answer choices, the only one that belongs to Group 1 is potassium.

C

Explanation:

Group 1 elements lose an electron to form charged positive ions.

Potassium is from group 1.

Potassium is most likely to lose an electron.

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