hree elements have the electron configurations 1 s 2 2 s 2 2 p 6 3 s 2 ,  1 s 2 2 s 2 2 p 6 3 s 2 3 p 4 ,  and 1 s 2 2 s 2 2 p 6 3 s 2 3 p 2 . The first ionization energies of these elements (not in the same order) are 0. 59 0 ,   0. 999 . and   0. 738 MJ / mol . The atomic radii are 1 0 4 .  16 0 , and 197 pm . Identify the three elements, and match the appropriate values of ionization energy and atomic radius to each configuration. Complete the following table with the correct information.

l>

Electron Configuration

td>Element Symbol

td>First Ionization Energy (MJmol)

td>Atomic Radius PM

td>

msp;  1s 2 2 s 2 2 p 6 3 s 2

msp;  1 s 2 2 s 2 2 p 5 3 s 2 3 p 4

msp;  1 s 2 2 s 2 2 p 6 3 s 2 3 p 5 4 s 2