A main group element with the valence electron configuration 3s23p1 is in periodic group . It forms a monatomic ion with a charge of . A main group element with the valence electron configuration 4s24p5 is in periodic group . It forms a monatomic ion with a charge of .

Electron configuration is the arrangement and distribution of electrons of an atom in an atomic orbital or of a molecule in a  molecular orbital.

They are arranged according to the energy levels known as 1, 2, 3, 4, 5, and in the shells namely K, L, M, N.

1.The correct answers for the blank  are:

In the periodic group III A the element with electronic configuration

is aluminium  (Al)  and the monatomic ion formed will be +3 charge.

2. The correct answers for the blank  are:

Chlorine (Cl)  is the main group element with electronic configuration of

and the charge of the monatomic ion is -1.

To learn more about electronic configuration follow the given link:

link

Follows are the solution to this question:

Explanation:

Please find the complete question in the attachment file.

In option a)

In the periodic group of main group component to valence electronic structure (IIIA group) and Aluminum (Al). The monatomic ion forms a load of (+3)

In option b)

The Chlorine within the periodic group (VIIA group) is the main group element for valence electron configuration (Cl). It constitutes a monatomic ion with a load of (-1).

the answers are

c and c