Question

(a) Identify the following neutral elements by their condensed electron configurations. (Enter the chemical symbol or name of the element.)

(i) [Ar] 4s2 3d5
(ii) [Kr] 5s2 4d10 5p3

Answer 1

Using the given electron configurations, the elements can be identified as (i) Manganese (Mn) for [Ar] 4s2 3d5 and (ii) Antimony (Sb) for [Kr] 5s2 4d10 5p3.

Step-by-step explanation:

The task is to identify neutral elements based on their condensed electron configurations. For the first configuration, (i) [Ar] 4s2 3d5, we are looking for an element with 2 electrons in the 4s sublevel and 5 electrons in the 3d sublevel. This corresponds to the element Manganese (Mn), which has an atomic number of 25. For the second configuration, (ii) [Kr] 5s2 4d10 5p3, the element has a full d sublevel and three electrons in the p sublevel following krypton. This is the configuration for the element Antimony (Sb), with an atomic number of 51.