Which of the following ions would represent the ion of an element from group 2a?
a. x2-b. y3+c. z+d. a2+

D. A²⁺

Explanation:

Element from Group 2A -

The element of group 2A are known as the alkaline earth metals ,

The elements of this group are - beryllium (Be) , magnesium (Mg) , calcium (Ca) , strontium (Sr) , barium (Ba) , and radium (Ra).

The valence shell of these elements have two valence electrons and therefore , if the element need to stabilizes itself , it need to lose these two electrons and attain noble gas configuration,

Therefore ,

After losing the two electrons , the element becomes A²⁺.

Hence , the ions are symbolized as A²⁺.

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