Use the periodic table to determine the element corresponding to each electron configuration. b. [Ar] 4s²3d¹⁰4p⁵

Verified step by step guidance

1. Identify the core electrons represented by the noble gas configuration [Ar], which accounts for the first 18 electrons.
2. Add the electrons from the 4s, 3d, and 4p orbitals to the core electrons: 4s^2 (2 electrons), 3d^10 (10 electrons), and 4p^5 (5 electrons).
3. Calculate the total number of electrons by adding the core electrons (18) to the electrons in the 4s, 3d, and 4p orbitals (2 + 10 + 5 = 17).
4. Determine the atomic number by adding the core electrons and the additional electrons: 18 (from [Ar]) + 17 = 35.
5. Use the periodic table to find the element with atomic number 35, which corresponds to Bromine (Br).

Key Concepts

Electron Configuration

Electron configuration describes the distribution of electrons in an atom's orbitals. It follows the Aufbau principle, which states that electrons fill lower-energy orbitals before higher-energy ones. The notation includes the principal quantum number, subshell type, and the number of electrons in each subshell, providing insight into the atom's chemical properties and reactivity.

Periodic Table

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

Noble Gas Notation

Noble gas notation is a shorthand method for writing electron configurations, using the nearest noble gas to represent core electrons. For example, in the configuration [Ar] 4s² 3d¹⁰ 4p⁵, [Ar] represents the electron configuration of argon, which accounts for the first 18 electrons. This notation simplifies the representation of larger atoms and highlights the valence electrons that are most relevant for chemical bonding.