Write the electronic configuration of aluminium in terms of sub shell

The Aluminium electron configuration will be 1s^22s^22p^63s^23p^1. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom. This makes it easier to understand and predict how atoms will interact to form chemical bonds.

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;