The Electron Arrangement for Argon, Which Has 18 Electrons, Is

The electron arrangement for argon, which has 18 electrons, is

A) 2 in the inner energy shell, 8 in the second energy shell, and 8 in the outer energy shell.
B) 8 in the inner energy shell, 8 in the second energy shell, and 2 in the outer energy shell.
C) 6 in the inner energy shell, 6 in the second energy shell, and 6 in the outer energy shell.
D) 5 in the inner energy shell, 6 in the second energy shell, and 7 in the outer energy shell.
E) 7 in the inner energy shell, 6 in the second energy shell, and 5 in the outer energy shell.