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Ch.9 - Periodic Properties of the Elements
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Not the one you use?Change textbook
All textbooksTro 5th EditionCh.9 - Periodic Properties of the ElementsProblem 44a,b,c
Chapter 9, Problem 44a,b,c

Use the periodic table to determine the element corresponding to each electron configuration. a. [Ar] 4s23d104p6 b. [Ar] 4s23d2 c. [Kr] 5s24d105p2

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Identify the noble gas core in the electron configuration, which is [Ar] in this case, representing Argon with 18 electrons.
Count the additional electrons beyond the noble gas core. Here, 4s^2 and 3d^2 contribute a total of 4 electrons.
Add the electrons from the noble gas core (18 from Argon) to the additional electrons (4) to get the total number of electrons, which is 22.
Use the periodic table to find the element with an atomic number of 22, which corresponds to the total number of electrons.
Identify the element with atomic number 22 as Titanium (Ti).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Electron Configuration

Electron configuration describes the distribution of electrons in an atom's orbitals. It is represented using a notation that indicates the energy levels and sublevels occupied by electrons. For example, the configuration [Ar] 4s² 3d² indicates that the element has the same electron configuration as argon, plus two electrons in the 4s sublevel and two in the 3d sublevel.
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Periodic Table

The periodic table organizes elements based on their atomic number, electron configurations, and recurring chemical properties. Elements in the same group often exhibit similar behaviors due to their similar valence electron configurations. Understanding the layout of the periodic table is essential for identifying elements based on their electron configurations.
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Transition Metals

Transition metals are elements found in groups 3 to 12 of the periodic table, characterized by the presence of d electrons. They often exhibit unique properties such as variable oxidation states and the ability to form colored compounds. The electron configuration [Ar] 4s² 3d² corresponds to titanium (Ti), a transition metal, which plays a significant role in various chemical reactions and applications.
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