How is the electron configuration of an anion different from that of the corresponding neutral a

How is the electron configuration of an anion different from...

Key Concepts

Electron Configuration

Electron configuration describes the distribution of electrons in an atom’s orbitals based on principles like the Aufbau principle, Pauli exclusion principle, and Hund’s rule. It outlines how electrons fill available orbitals in order of increasing energy and is central to understanding atomic structure and chemical behavior.

Ions

Ions are atoms or molecules that have a net positive or negative charge due to the loss or gain of electrons. This change in electron count directly affects the electron configuration, differentiating ions from their corresponding neutral atoms.

Anions

Anions are negatively charged ions formed when a neutral atom gains one or more electrons. The electron configuration of an anion includes these additional electrons, which are typically added to the outermost orbitals, increasing electron repulsion and potentially altering properties such as size and reactivity.

Cations

Cations are positively charged ions created by the loss of one or more electrons from a neutral atom. The electron configuration of a cation is adjusted by removing electrons, usually from the outermost orbitals or those with the highest energy, leading to changes in the atom’s chemical and physical characteristics.

Transcript

00:01 Chapter 3, problem 32, says, how is the electron configuration of an anon different from that of the corresponding neutral atom? and how is the electron configuration of a cation different? so what is an anion? an anion is something that gains electrons.

00:26 When something gaining electrons becomes more negative, but often has a negative charge.

00:32 If you think about a cation, a cation is opposite.

00:38 It is something that loses electrons, loses electrons, and it becomes more positive.

00:59 Let's make sure we spoke that correctly.

01:00 There we go.

01:03 The electron configuration of an ion would be different from that of a count -out because the number of electrons is different.

01:11 Anions are generally located on the right side of the periodic table as non -metals.

01:15 So let's choose an anion.

01:17 We'll choose oxygen.

01:18 The electron configuration for oxygen is as follows.

01:21 A neutral atom of oxygen would be 1s2, 2s2, and then we move into the p orbitals.

01:36 So that would be 2p, and because this is element number 1, 2, 3, 4, 1, 2, 3, 4, and the p orbital will be 2p4.

01:47 We can make sure this is correct because the atomic number of a neutral atom is a number of protons, which is equal to the number of electrons.

01:55 The atomic number here is eight, so we should have eight electrons, four, five, six, seven, eight.

02:01 That is correct.

02:02 But as an anion oxygen, so this would be a neutral atom of oxygen...

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