Question

configuration, Choose the answer that best completes the following statement: When an aluminum atom reacts so as to attain a noble gas electron configuration, the atom gains five electrons. the noble gas configuration of argon is achieved. a 3- ion forms. the result is a configuration of 1s22s22p6. none of the above

Answer 1

Answer:

The correct statement is : The atom gains five electrons.

Explanation:

Aluminum has the atomic number of 13.

The electronic configurations of aluminum is given:

$[Al]=1s^22s^22p^63s^23p^1$

So, in order to gain stability of noble gases aluminium ether have to gain 5 electrons or loose three elections.

By gaining five electrons its electron configuration gets same as that of the argon's electronic configuration.

$[Al^{-5}]=1s^22s^22p^63s^23p^6$

So, the charge on the aluminium ion will be (5-).