Question
An ion formed by an element in group 1,2,6 or 7 will have the same electron structure as which of the following? noble ggs halogen metal acid
Answer
4.3
(199 Votes)
Edwin
Veteran · Tutor for 11 years
Answer
A. noble gas
Explanation
Elements in groups 1, 2, 6, and 7 of the Periodic Table are known to form ions quite readily. The elements in group 1 (alkali metals) lose one electron to form a single positive ion, group 2 (alkaline earth metals) lose two electrons to form double positive ions. By doing so, they achieve a stable filled electron configuration of the nearest noble gas in the Periodic Table.For instance, Sodium (Na), a group 1 element, loses one electron to form Na+ and achieve the electron configuration of the noble gas, Neon (Ne).Similarly, elements in group 6 and 7 prefer to gain electrons to fill their outermost shell to have a stable electron configuration like that of a noble gas. For example, Chlorine (Cl) from Group 7, gains one electron to form Cl- ions to achieve a stable configuration similar to the noble gas, Argon (Ar).On forming an ion by an element in group 1, 2, 6 or 7, the elements achieve a stable configuration which matches closer to the electron structure of a noble gas. That's never the case with metal, halogens or acids because they are involved in different types of reactions specified with their own properties according to their electron configurations compared to noble gases, which have filled electron configuration in their outermost shells and are known to be stable.