What element forms the smallest 2 plus ion?

Answer 1

All of the Group 2 elements, the Alkaline earth metals, want to lose two electrons and form an ion with a +2 charge. And of these elements, it is radium that is the most reactive. Radium wants to lose its two valence electrons more than any of the other elements of its group.

Remember that reactivity increases as we move down the groups on the left side of the Periodic Table (with one exception). These elements each wish to shed their valence electron(s) and form an ion. In the case of the elements in Group 1 of the table, the Alkali metals, they wish to shed their single valence electron to end up with a +1 charge. And caesium, which is the second-to-last element in that group moving down, is a bit more reactive than francium, which is below it. That's the lone exception to the rule.

When we consider the elements of Group 2, we find that radium is the most reactive, as we've already stated. It (radium) is at the bottom of the Group 2 elements.

Answer 2

around all elements except those which had attended a stable electronic configuration can form ion.ions are actually the charged atoms formed due to the gain or loss of electron by it.positive ions are formed by loss of electron due to which the number of protons(positively charged sub atomic particles) becomes more than the numbers of electron(negatively charged) and it is called cation.

similarly,in case of anion(negative ions) it is opposite of the above.

Answer 3

Helium forms the smallest 2+ ion. When helium loses two electrons, it forms He2+ which is the smallest 2+ ion due to its small atomic radius and low electron affinity.

Answer 4

Be-Beryllium

Answer 5

Be