Name the element that corresponds to each electronic configuration.a. 1s2 2s2 2p2b. 1s2 2s2 2p4c. 1s2 2s2 2p6 3s2 3p3d. 1s2 2s2 2p6 3s2 3p5

Ch.1 - Structure and Bonding

Wade9th EditionOrganic ChemistryISBN: 9780135213728당신이 사용하는 게 아니라요?교과서 변경

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Wade 9th Edition

Ch.1 - Structure and Bonding

문제 27

1장, 문제 27

Name the element that corresponds to each electronic configuration.
a. 1s² 2s² 2p²
b. 1s² 2s² 2p⁴
c. 1s² 2s² 2p⁶ 3s² 3p³
d. 1s² 2s² 2p⁶ 3s² 3p⁵

검증된 단계별 안내

To determine the element from an electronic configuration, count the total number of electrons, which equals the atomic number of the element.

For configuration a (1s^2 2s^2 2p^2), add the electrons: 2 (1s) + 2 (2s) + 2 (2p) = 6 electrons. The element with atomic number 6 is Carbon (C).

For configuration b (1s^2 2s^2 2p^4), add the electrons: 2 (1s) + 2 (2s) + 4 (2p) = 8 electrons. The element with atomic number 8 is Oxygen (O).

For configuration c (1s^2 2s^2 2p^6 3s^2 3p^3), add the electrons: 2 (1s) + 2 (2s) + 6 (2p) + 2 (3s) + 3 (3p) = 15 electrons. The element with atomic number 15 is Phosphorus (P).

For configuration d (1s^2 2s^2 2p^6 3s^2 3p^5), add the electrons: 2 (1s) + 2 (2s) + 6 (2p) + 2 (3s) + 5 (3p) = 17 electrons. The element with atomic number 17 is Chlorine (Cl).

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주요 개념

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Electronic Configuration

Electronic configuration describes the distribution of electrons in an atom's orbitals. It follows the Aufbau principle, which states that electrons fill orbitals starting from the lowest energy level. Understanding electronic configurations helps identify elements based on their position in the periodic table.

Periodic Table

The periodic table organizes elements based on increasing atomic number and recurring chemical properties. Each element's position reflects its electronic configuration, allowing for easy identification of elements by their electron arrangement. Recognizing patterns in the table is crucial for determining the element corresponding to a given configuration.

Valence Electrons

Valence electrons are the outermost electrons of an atom and determine its chemical properties and reactivity. For main group elements, the number of valence electrons corresponds to the group number in the periodic table. Identifying valence electrons from an electronic configuration helps pinpoint the element's group and thus its identity.